I don't see DVC as buying or financing real estate, I see it as paying monthly rent for an annual or longer vacation. You're left with nothing at the end either way. The only advantage is knowing how much that vacation is going to cost each month.
I have run the numbers many many times. Even with paying all cash, I still don't get the advantage of paying thousands of dollars a year for a vacation that will cost thousands of dollars a year anyway. If I own 200 points and my maintenance fee is $7, I'm paying $1400 just for maintenance and that is where I draw the line. Not worth it. (But I will happily rent points and help that member pay their fees
But I listen to the DVC show, especially Jackie, and it all sounds wonderful and I wish I had bought when Boardwalk opened. We toured it and just weren't in a good place then. But we didn't even know we could finance directly with Disney or we would probably have jumped in anyway lol.