RCI points:
First: The TUG motto "BUY RESALE"
So you have want RCI points and are going to follow the TUG motto "Buy Resale" you need to buy a RCI affilated property and then hope several things are true.
1. That the unit you bought is already converted to RCI points and the resort will honor that convertion. (some resorts will not!!)
2. That the unit you bought isn't converted to RCI points but the convertion fee is small. ( RCI charges ~$200 to convert to RCI points and a few resorts charge just that $200 but most resorts charge a much greater fee sometimes well over $3,000)
3. That you find a broker, who specializes in RCI points sales, and has lots of options and resorts that they will sell you at resonable prices. There are several brokers, which have been mentioned here, which sell TSs in South Africa and Austrailia which are setup as easy resale resorts for RCI points.
I have some misgivings about buying overseas. Resorts in South Africa have recently seen their trading power drop signifcantly. I don't know about the canary Islands but IMHO, I'd probably stay away from them if I lived in the US.