Dean, the rental business you mentioned doesn't really exist anymore. The websites that I used to use are littered with RCI exchanges for prices I could not afford to try to match. When a two bedroom BCV is listed for $1500 for 7
Nights... Well you get the idea.
The first thing you need in retirement is security. The last thing you should have is something you don't need. I agree to wait until your plans are more settled before buying more points. BUT if the OP has enough discretionary cash then
DVC is sure a fun product to own, especially purchased on the resale market.