Up to you really... some do Hour Building while doing their ground school, some build the hours then come back and finish ground school.
Personally I wouldn't recommend Florida for Hour Building. Hour building should be about building on experience, you won't learn as much if you are flying in perfect weather conditions, on flat ground with loads of room to do what you please.
If you want to head abroad, I would recommend New Zealand or you could stay home, get a share or payment plan with an aircraft which will reduce the flying costs to almost the same as Florida rates but without the extra travelling, VISA, Accommodation costs.