Also, I have no idea how they calculated the PITI. Taking SF as an example (and rounding the numbers): Assuming a 1.25% property tax rate (i Googled it) the payment on a 30 year fixed rate loan of $544,000 (which is the loan on a $680k home with 20% down) at the given 4.39% rate is $3430/mo. This is before adding…