Rented a house and stayed a week in St. Thomas USVI a few years back; found out a few things about island life. Number one, in this location the only available water was rain water, so they had a collection system that stored the water in a tank in the basement, and a purification system. You had to be very conserving on water, and careful about not taxing your septic system. Their motto was "If it's yellow, let it mellow. If it's brown, flush it down."
#2, the island had had to import oil from Venezuela to make electricity, so the bill for this house ran over $1200 per month. I did see a few of the giant windchargers there but the didn't improve the view any. Gasoline was very expensive.
Once you do the sightseeing thing, spend a few days at the beach and spend a hundred bucks a night eating out, there wasn't much to do. Roads were narrow, winding, mountainous and slick, besides having to drive on the left hand side of the street. Grocery stores smelled like fish.
One good thing if you want to look at it that way; liquor, especially rum, is very cheap. We were cautioned that when you order a drink, be careful...the mixer is more expensive than the alcohol, so it will be strong!
I will say though, one of the most breathtaking and beautiful places I have ever been.