We looked at Bel Shores. They are beautiful, remote, and very strict on their rules. We didn't care for the strictness. If you are going into the renters pool, you have to buy their furniture pkg, and can only spend a certain amount of time there. And you can only have certain items on your patio. My guess is that the return would be good there, but I don't know if you would want those kinds of regulations.
We stayed at the Playador, and I know that they have a couple of units for sale, $89k. That's a great location, and they are much more laid back. We saw several houses that had more than one unit. So that may be something to look into. One building is close to the Yacht Club, 2-2 br and 2-1 br. We had thought we would rent out all but one of the one bedrooms, until we moved down full time. When we talked about it, we decided to move pretty quickly. My thought is that property will go through the roof in the next 2 years---maybe 6 months... Keep in mind too that while property is expensive, building is not.
Hope that helps...