How expensive a house could a buyer purchase if they were making $175,000 annually, if they were going to put down 20%. The interest rate is 6.25% and the amortizatino will be over 30 years. The taxes on the house are $12,000 and property insurance is $2500 annually. They have $700 in car loans, $500 student loans and credit cards of $400, all monthly. The bank underwrites to 43% on total housing and debt.