Abstract: A method of comparing at least two purchase scenarios, the method comprising the steps of: determining a first cash flow analysis for a first mortgage scenario including a takeup of a first percentage of ownership of a mortgaged property; determining a potential first capital gain attributable to the first percentage of ownership; determining a second cash flow analysis for a second mortgage scenario for the same property with the second scenario having a takeup of a second percentage of ownership of the mortgage property; determining a potential second capital gain attributable to the second percentage of ownership; determining a first difference between the first and second cash flows; determining a second difference between the first and second capital gains determining the ratio of the second difference to the first difference.