I would get at least a 28, I know too many people that got a 24 and regretted it afterwards, she will fill up fast.
Getting a dually is your best bet, more stable and has better brakes, you will have a lot of weight behind you. having an extra set of wheels won't make a difference when parking, you just learn to back into a spot
For trailers in Florida, give Kenny Anderson a call at Fast Farm Trailers 561-358-4351