Feasibility Assessment (go / no go)

a. When you do a Property Development Feasibility Assessment before you start your development project what % Net Profit (or Return of Capital Cost) are you looking for before you decide to continue?
b. How often do you update this Feasibility Assessment (and cash flow analysis) over the life time of your development project?
c. Once you completed your project what is the % Deviation in Net Profits (or Return of Capital Cost) before you started and now that you have completed the project?
d. Do you think doing a feasibility assessment is a waist of time and effort – why?
e. Can my accountant help me with this?

Thanks to all!!