Ventilation will be a concern, due to Florida's high temperature & humidity. A closed up vehicle or house can grow a fine crop of mold over the summer .
We've lived in Florida for 44 years and for the last 20+ we've we've closed up our house and left a vehicle stored while we travel for the summer. The best solution is to leave a/c running (ours is set to 89 F) and #2 is to install a dehumidifier. 3rd choice is some open ventilation, preferable with a fan to stir the air. Of course, the venting has to allow for Florida's frequent heavy rains, possibly wind driven.
A dehumidifiier chemical such as Damp Rid works too, but will need periodical replacement during the summer as it absorbs imposture from the air.
Keeping fridge, closets and cabinets open helps with air circulation and mold prevention. So does a through cleaning.