If you need any assistance, you are welcome to contact me.
Bank of America Home Loans
Both answers below are correct. Additionally, is there any possibility that the income of your wife alone may qualify? If so, you could put the mortgage in just her name to avoid a rate penalty or rejection of your application. If the loan must be in both of your names, Pat was correct that you'll pay much more for the loan. Good luck, and feel free to email me if you have questions about the process.
E Mortgage Management
800.793.9633 ext. 156
Rob is correct, the lender will always base your rate and qualification on the lower of the two borrower's scores. Some lenders will still provide financing at 600 - Flagstar Bank will consider a loan with a score above 600. Expect to pay an additional 1% in 'points' or receive an interest rate .5% higher.
Your loan will be graded on the lower of the two middle FICO scores. Both you and your wife have three scores each.
At this time, your first order of business will be finding a lender that will do an FHA loan with a middle score of less than 620. Unfortunately, we are not one of them. But again, concentrate your effort here before proceeding further.
I am assuming that the scores you listed above are recent and derived from a full (tri-merge) credit report. If not, your true score might actually put you above 620.