worth checking out marriott villas at doral...usually about £100pn for a 2 bed villa there and no resort fees/parking charges.
We've also got crowne plaza sawgrass mills for $99 a night (need to wait for the rate to come down) and fairmont turnberry isle at $99...an amazing hotel but pricier when you add resort fee/parking.
check out the splendia website becuase they run deals where you get say £50 off (go via quidco etc too) where you can get a night for as little as £55 pn on the beach, but always check resort/parking fees too.