Are you going to paying ALL CASH or will you need to get a lender to pay for your purchase?
If you are not buying with all cash your first step is to find a lender who will be able to give you the correct answer about getting a mortgage. You may have to "wait" until you start work in Miami.
You can contact http://www.KristineBredeau.com and she is with HomeBanc. They are not mortgage brokers who do not actually lend money, they are a direct lender. You will get an accurate answer from her.