Referring to original post.
If you really like a place then buy there resale. Get a good deal on TUGG or Redweek or some other place. If you buy at a quality resort and reserve high demand weeks then you will be able to rent it if you don't go. I own at the Marriott Maui Ocean Club. We love the resort. We bought it resale and it has been a great "investment". When we use it we save money and can live there, bring food, etc. When we don't go I reserve it for spring break or some other high demand time (almost any week of the year in HI) and I rent it out and get much more than my fees. I actually make money with a good rate of return based on my resale purchase price. It has been great. It just takes a little bit of effort (not too much though). I'm thinking if you put this much effort into analyzing it then you must like the place a little. Or maybe you just like crunching numbers that much. Sicko! Just kidding!
Just as an example, we got pitched for the first time at Marriott Waiohai in Kauai. My wife was ready to go. I said "lets think about it". They were selling an every other year week for about $22,000 (around 2006 I think). The cheapest one listed on Redweek right now is $3,799. Both are Island view, every other year (all are 2 bedrooms there). The resort is beautiful and the fees are the same whether you bought from them or resale. So if you are even considering buying from the developer and you like the place that much then just buy resale. If you hate owning it just sell it. You won't take a bath that way. Most likely you will go a couple of times and say "man I'm smart. I pay $2100 per stay in fees and these guys are paying $5000 and they have to pay for parking!" or something like that. That's how I feel.
The best option for you may be to just rent timeshares if they are a better deal than the hotel prices wherever you are going. Stick with quality names like Marriott, Hilton, Starwood, etc. If you can rent a nice hotel room there then it is probably the right place. People like me that own timeshares and rent them out will gladly make a little money and you will still get a deal. This will help you explore more places. If you find that you love one of them then you can look at buying something, resale of course.
Good luck and happy travels!