- some (large?) portion of mortgages will not allow PMI to be removed until you either a) inject cash to get to 20% equity or b) get to the time in the amortization schedule when you are scheduled to get to 20% equity. That is, if your home increases in notional value by 20%, you still have to pay PMI. So the PMI line item should probably not terminate after 3 years.
- It would be awesome to include a rent growth factor. When I bought my first house, my annual mortgage was > the amount my next-door neighbor paid to buy his (similar) house. (Which would be driven in part by rents at that time.) Part of the benefit of home ownership is insulation from rising rents, and adding a rent factor would capture that.