Seth at Barefoot had a former liveaboard's boat similar that a few years back..
http://barefootyachts.com/Most would get acclimated to the heat and humidity with a long stay. You may not need the expense, noise, hassle, and loss of space that comes with a generator. If you do venture far from the operator's base after early June you will have to come up with a storm plan. That is a long time on a boat? You may want to consider a contract that takes you to the start of the storm season. Once the low season starts there will be many, many, boat options if you want to consider extending your time on the boat. I would even consider March to June in the Carribean and June to August somewhere in Europe if I had that window of time?
