Even if you could--recognizing the cautions regarding the arm's length transaction and the warnings regarding bank fraud--it'd be a terrible idea.
The previous owners have to get on with their lives. You might think you'd be doing them a favor by renting them back the home they lost. Or, even worse, offering it as a lease-option. There have been various abuses of that strategy. A number of states, including Maryland, have passed laws which (to oversimplify) make it a felony to do what you're planning. I don't know if Florida is one of those states. The problem often arose over miscommunication--intentional or accidental--between investor and former owner.
Bad, bad idea.