I think it pays to look at actuals:
7nights @ DLH rack for a premium view room in June is
$2,689.25
(2235 plus 15% room tax and $17 per night resort fee (both are waived for stays booked on points)
same stay would be
203 DVC points
you'd have to pay $13 a point or less to save money and make renting a better deal (or be able to get more than 25% discount off rack rate). I think most points rent for about $10-$12, but you can get some bargins at much lower, especially for a DLH stay as some members have points that they can only use at DLR hotels due to one reason or another and are willing to rent them at much lower prices.
Now, that said, the DLR hotel
point charts can go up, and many speculate that they will either when the GC Villas open or after DLH completed it's planned refurb. So, I wouldn't take today's analysis and expect it to work for 50years. If you want that guarantee it's best to purchase at VGC.
Note: it's difficult to calculate the above for the VGC as no one knows yet how many VGC members will rent their points and at what price...