Hello Dougko, you can just use one pre-approval letter/DU Approval to look at as many homes as you want.
You will need to be pre-approved to be able to meet an agent to view and submit offers on any homes of your choice. Do you know what your fico scores are and how much you want to invest into the purchase?
Your qualifications will be determined by your credit profile, debt to income ratios, fico scores, loan program and how much you want to invest into the purchase.
How much do you pay in rent and what is the maximum payment you are looking to afford? You may consider 5% down jumbo from a minimum 720 fico score up to 1.5m and a minimum 660 fico score may consider 10% down jumbo up to 2.5m.