At $80,000/year of salary the largest mortgage you can qualify for is at $2,400/month. A 450,000 mortgage at 3.5% with 1% tax on a $750,000 house and $2,000/year of insurance would be $2,800/month mortgage. You would be really close if you could find something at 650,000. Then get at least 1-2 roommates to make sure you are not over-extending yourself.