If limited funds are a factor as you say, I'd go for the gas
generator for now, until you can afford a wind generator that won't make you enemies in every anchorage in the
Caribbean.
I'm not kidding, we can hear the
cheap windgens (I'll not mention names to avoid THAT old argument) all around the anchorage and despise their intrusive
noise. From a lot of
research and personally checking every one out (and talking to the owners) IMO a quiet, reliable windgen will cost you upwards of 2k. The cheaper ones also create more resonance through out the
boat as the 3 blades cause much more vibration than the 5 according to owners that have had both.