Set the margin you need, and the solver works backward to the land price that actually supports it. It checks stamp duty and title fees again at every price it tests, not just once at the end.
Residual land solver
Residual land value
$727k
Revenue
Costs
Finance
Finance cost uses the standard feasibility shorthand: a progressively-drawn loan's average balance treated as roughly half of peak debt, not a dated drawdown schedule. Duty rates are general figures, without PPR concessions or foreign-buyer surcharges. Both are disclosed right in the tool, not hidden in a footnote.