Pre-construction or resale? The break-even decides.
Both paths cost money over the same window. The honest question is not which one “wins” on assumptions you picked — it is how fast prices have to rise before the pre-construction premium pays for itself. That number is at the bottom of the results, and it is the only output here worth arguing about.
Scenario
The resale side
Assumptions
Net position is not
profit or loss.
Both columns are usually negative, because housing costs money. You also got somewhere to live for the whole horizon, which never appears as a number. Compare the two figures against each other — the absolute values are illustration, not a forecast.
What the model counts on the pre-construction side
What it counts on the resale side
Interim occupancy, the phase nobody explains
What the model deliberately leaves out
The part a calculator cannot price
A model, not a forecast. Builder closing costs, occupancy periods and completion dates are estimates that move. Treat the break-even figure as the output that matters and the totals as illustration. Confirm any figure you intend to rely on with your lawyer, accountant and mortgage professional.