If you want something all inclusive in Florida, there arent many options - the Club Med Sandpiper is there, its not all that high end, but it is a fun place. Its on a river instead of at the ocean too, which is a problem for some. They do do weddings if you contact them ahead of time. If you are a US citizen, you are probably better off heading to Mexico if you want a deal on a good property, all inclusive, that does weddings.