Elizabeth wanted a house so much that it was the first thing on the table when she met her financial planner. She was expecting her first child, and the house in her mind was never really a building....
Elizabeth wanted a house so much that it was the first thing on the table when she met her financial planner. She was expecting her first child, and the house in her mind was never really a building. In her planner's telling, "She wanted birthdays in the backyard. She wanted to decorate a nursery. She wanted a space for more children to grow and run. She wanted a nest in which her family would blossom and thrive, and that she would fill with laughter, stories, and memories." If you have ever stood on a plot of land, or in a half-finished upstairs room, or on a video call with a builder three time zones away, and felt your whole family's future assemble itself in front of you, you know exactly what Elizabeth felt. Nothing in this essay will tell you that feeling is wrong. The feeling is the point of everything else in this essay.
The planner is Morgen Rochard, a chartered financial analyst, certified financial planner, and Registered Life Planner, and Elizabeth's longing opens the home-buying chapter of her Personal Finance QuickStart Guide (2020). Rochard honors the longing and then refuses to let it negotiate alone, because she has watched what happens when it does: "everything about our dream home is non-negotiable except for the rising sticker price." Her chapter's discipline can be compressed into one instruction, and it is the instruction this essay exists to hand you. Decide your number before you see the house. Not the bank's number. Not the seller's number. Yours, computed at your own table, while you are still calm.
Rochard's cautionary couple is Krista and Martin, who, like all the book's clients, are an anonymized composite from her advisory practice of about thirty households. They earn $85,000 a year. Their bank is willing to lend them $400,000 toward the $500,000 home they want, and here is the arithmetic the bank's yes conceals: that mortgage, with insurance and property taxes, would consume 36 percent of their pretax income. Add the roughly $5,000 a year that maintaining such a home costs, and, in Rochard's words, their total home-related expenses reach "nearly 42 percent of their pretax income! On an after-tax basis, the number is more like 50 percent." Half their money, she notes, "spent before they wake up and put their feet on the carpet."
The lesson is not that the bank made an error. The bank made no error at all. A lender's maximum offer is a statement about the bank's risk appetite, its models, its collateral, its recovery process if things go wrong. It is not, and was never designed to be, a statement about whether your family can still save, still educate, still absorb a bad year, still fund a single dream that is not the house. The bank is answering the question "how much can we safely lend you?" The family needs the answer to a different question entirely: "how much house can we carry while still building everything else?" Confusing the two questions is how a family ends up house-rich and future-poor, and the confusion is universal. In Lagos and Nairobi the same script runs through mortgage products and through the informal version: the plot purchased at a stretch because a broker said the area is about to boom, the building begun at the scale relatives will admire rather than the scale the family's cash flow can finish.
Rochard's alternative is a formula of her own devising, and its virtue is that it exists at all: "I like using 1.7 times pretax income as a starting point for mortgage balances. Rather than picking a number out of thin air, you have something to go on!" The full method takes ten minutes. Multiply pretax household income by 1.7 to get a target mortgage balance. Divide by 0.8 to get a total purchase budget, which assumes 20 percent of the price paid up front. Then cross-check the result against her hard ceiling: all housing costs together, loan payments, taxes, insurance, maintenance, should stay at or below 20 percent of pretax income.
Her worked example: a household earning $105,000 targets a mortgage of $178,500, which implies a purchase budget of about $223,000, and the cross-check confirms that everything above that level starts eating the 20 percent ceiling. Set that against Krista and Martin, whose bank-blessed plan sat above 40 percent, and you can see what the formula is actually for. It is not a law of nature; Rochard herself says to adjust it when interest rates or local taxes differ. It is an anchor, deployed before you fall in love, because after you fall in love every number feels negotiable.
Now the honesty the formula demands. Its assumptions are American infrastructure through and through: 30-year fixed mortgages near historically low rates, 20 percent down payments as the norm, and a market where a smaller deposit triggers PMI, private mortgage insurance, an extra premium American borrowers pay to protect the lender, inside a system whose lending thresholds are set by government-backed institutions. Almost none of that exists for most of the families we write for. Mortgages in much of Africa, where available at all, carry interest rates that make the 1.7 multiple genuinely unaffordable, which is precisely why most African families build rather than borrow: buy land, then build in phases as money allows, over years. So take the formula as a shape, not a statute. The shape says: your housing commitment should be a disciplined multiple of your actual income, decided in advance; and the total cost of housing, including the costs nobody mentions, should stay near a fifth of what you earn so the rest of life stays funded. A family building incrementally can translate it directly: cap the total build budget, land plus construction to completion, honestly estimated, at a sensible multiple of annual income, and cap each year's construction spending at roughly the same fifth of income the American version reserves for the mortgage. The discipline survives the ocean even though the instruments do not.
The second tool in Rochard's chapter answers the question every couple fights about at least once: are we throwing money away by renting? Most answers to that question are folklore. Hers is a formula. Add up what owning truly costs per year, as a percentage of the home's value: property taxes at roughly 1.7 percent in her American context, maintenance at roughly 1 percent, and 2.6 percent for what she calls the cost of capital, a figure she builds from the interest on the borrowed 80 percent plus the opportunity cost of the 20 percent down payment, money that could otherwise have been invested, using a century of comparative returns data showing stocks outrunning real estate. The total: "the cost of owning is roughly 5.3 percent per year." Her worked example is stark. "On a $1 million home, if you can rent for less than $53,000 per year ($4,417 per month), then it is cheaper to rent."
The exact percentages are American and 2020-vintage; your property taxes, your interest rates, and your alternative investments will move every input, and in many of our readers' cities the formal rental market and the land market are so different that the comparison needs local numbers throughout. Run it with your own. What travels intact is the method's honesty: ownership's true price includes the money the down payment could have earned elsewhere, and the repairs, and the taxes, and almost nobody prices those in when they say rent is wasted money. Rochard's underlying claim will be uncomfortable in any culture that treats a house as the definition of arrival, and she does not soften it: homes, she writes, are not investments but consumption items, "much less productive assets than we choose to believe." For a diaspora family weighing whether to keep renting in Houston or London while building back home, this formula is the missing tool: run the true-cost math on the foreign purchase, honestly, and you may find that renting abroad while your capital builds a debt-free family seat at home beats owning in both places badly.
There is one more American instrument to translate before we move on: the down payment itself. In Rochard's world it is a lump sum handed to a bank on closing day. In ours, its nearest relatives are the SACCO share account, the savings group payout, and the family land contribution, and they carry an advantage the American version lacks: they can be accumulated communally and visibly, with the discipline enforced by people rather than by a lender. The principle is identical. The house money is assembled, deliberately and separately, before the house is chosen.
It would be easy to read this essay as the math against the dream, and that reading would miss what Rochard actually does with Elizabeth. She never tells her the nest is foolish. She tells her the nest is so important that it must not be built on a number chosen by longing. "When you purchase or rent a home on the edge of what you can afford," she writes, "you are making a trade-off: short-term comfort over long-term ability to build wealth." The birthdays in the backyard are real, but so is this: a family stretched to 50 percent of income on its house cannot absorb a hard year, and hard years come. The house meant to hold the family's laughter becomes the reason for its quietest arguments. Anyone who has watched a relative's half-built structure stand roofless for a decade, a monument visited twice a year and mourned in between, knows that the dream unfunded does not stay a dream. It becomes a debt with a view.
So put both people at the table on purpose. Let Elizabeth speak first: what is this home for, which memories is it meant to hold, what would make it a nest rather than a display? Then let Krista's ledger speak: the income multiple, the yearly carrying cost, the honest completion estimate, the rent comparison. Where the two conversations disagree, the number does not automatically win; sometimes a family knowingly pays extra for a place with meaning, near the grandmother, on the ancestral hill, and writes that choice down as what it is, a purchase of meaning. What the number is allowed to veto is only the unknowing version, the stretch nobody calculated. The goal is a home the family chose with open eyes, not one that chose them in a hot moment.
This is also, finally, a savings problem before it is a shopping problem, which is where LegacyPot fits into the story. A house decided in advance needs a place where its money accumulates in advance, visibly, with its own name on it. That is precisely what the Legacy Pots module is for: open a pot called The House, set the target your formula produced rather than the one the broker suggested, and let every family contributor watch it fill. A number the whole family can see is remarkably good at defending itself against a beautiful staircase.
Here is the one thing to do this month, before you visit a single site or open a single listing. Sit down with your household's real pretax income and compute your number three ways. First, the anchor: a disciplined multiple of income for the total commitment, using 1.7 as the starting shape and adjusting honestly for your interest environment, or, if you are building, an all-in completion budget capped the same way. Second, the ceiling: total yearly housing cost, loan or construction plus taxes, insurance, and maintenance at 1 to 3 percent of the property's value, held near 20 percent of pretax income. Third, the comparison: the true annual cost of owning against the real rent for an equivalent home, with the opportunity cost of your capital included. Write the resulting number down, on paper, both spouses' signatures under it, and open a pot for it.
Then, and only then, go look at houses. Elizabeth's nest, the birthdays, the laughter, the room for children to run: all of it is available, and it is far more likely to be built, finished, and kept by the family that walked in already knowing its number than by the one that waited for a bank, a broker, or a beautiful backyard to supply it.