I have written a lot about this lately but here is another article geared towards those retiring but it does show the average rent and mortgage payment for Miami. Remember that you want to look at the price to rent ratio.
For anyone weighing a move, one of the easiest ways to approach the buy-versus-rent question is to use the “price-to-rent ratio,” says Dean Baker, co-director at the Center for Economic and Policy Research in Washington, D.C.
http://online.wsj.com/article/SB20001424052748704541304575099882517652948.html?mod=djemITP_h

Located in South Florida, Justin Miller has established himself as a leader in the mortgage community for his expert advice and understanding of the current real estate climate.