Residential build to sell
Apartments or townhouses sold on completion. Revenue is per-unit sales. Use this for the majority of Australian BTS projects.
Build to rent
Apartments held for rental income. Revenue is gross rent less operating costs, with terminal value at exit.
Mixed use
A residential model with one or more commercial floors. Revenue is split between unit sales and capitalised commercial income.
Not sure
Start with the closest match. You can change models on a scenario without losing your inputs.