Just going to offer some opinions:
I would be less likely to own
DVC if we lived in Florida just due to the discounts that are offered to FL residents and have been for years.
I wouldn't buy at VB unless that is where you want to stay the majority of the time. It sounds like you want to use your points at WDW. If you do buy in, why not try BCV or BWV-I read that you don't have to be a current member to get Boardwalk points again.
The dues are higher at VB so it basically evens out with whatever "specials" they are offering. I know they are doing the $74 keep your pts special but I still would buy at WDW if a majority of my vacations were going to be at WDW.
I don't think DVC cares about debt to income ratio, etc. If it is high you may get asked to put a higher percentage down. As long as you don't have any judgements against you or a bankruptcy(sp?) you're generally okay. When we were in the early stages of buying in I also asked about debt to income ratio and a poster said "If you think you're debt to income ratio is too high, then your money should probably be going elsewhere".
I appreciated getting opinions from both sides and feel that it helped us make more of an informed decision.
Also, DVC doesn't go on your credit report unless you default so it won't get in the way of a refinance or future car loan, etc.
I'm sure you already are pretty informed since you owned before.
Good luck with your decision.