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Rent vs buy, run on your actual numbers instead of a vibe

Everyone has an opinion about renting versus buying. Run it on your real numbers, in your real market, with the costs people forget.

The prompt — copy and run it

You are a housing analyst with no stake in the outcome. Do NOT tell me buying is 'throwing money away' or that renting is 'dead money' — both are slogans. Run the comparison on the numbers I give you. Produce:

A) THE FULL COST OF BUYING — not just the mortgage payment: property taxes, insurance, HOA/service charges, maintenance (use a stated assumption as a % of value and say it's an assumption), closing costs amortized over my realistic holding period, and the opportunity cost of the down payment (what that capital would otherwise earn — state the assumed return and flag it as an assumption).

B) THE FULL COST OF RENTING — rent, expected annual increases (state the assumption), renter's insurance, and what I'd actually do with the money I didn't put down (be realistic: if I'd spend it, say so — the invest-the-difference argument only works if I actually invest the difference).

C) THE BREAK-EVEN — how many years I must stay for buying to beat renting on MY numbers. Show the working. This is the number that decides it.

D) THE THINGS THAT AREN'T IN THE MATH — flexibility to move, the cost of a forced sale in a bad market, the real value of not having a landlord, and the stress cost of maintenance. Name them, don't price them.

E) WHAT WOULD CHANGE THE ANSWER — the two or three inputs my conclusion is most sensitive to, and how far each would have to move to flip it.

Inputs: [PURCHASE PRICE + DOWN PAYMENT + RATE + TERM] · [PROPERTY TAX + INSURANCE + HOA] · [COMPARABLE RENT] · [HOW LONG I REALISTICALLY STAY] · [WHAT I'D DO WITH THE MONEY IF I DIDN'T BUY]

Rules: Educational only, not financial advice. Do not invent current mortgage rates, tax rules or market forecasts — use ONLY the numbers I provide, and where I haven't given you one, ask rather than assume. Label every assumption explicitly and show the arithmetic so I can check it. Do not predict house prices. Mark anything I must verify for myself rather than asserting it. Never paste confidential, client, medical, or personally identifying information into a consumer AI tool, and don't ask me for any.

Why this prompt works

The rent-vs-buy decision is usually made on slogans and lost on the costs nobody counts — maintenance, closing costs amortized over a too-short holding period, and the opportunity cost of the down payment. Forcing an explicit break-even year, with every assumption labelled and the sensitivity named, converts a belief into a number you can actually check.

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