If you're looking for opinions, mine is one should not finance vacations. I don't see DVC as an investment, it's a vacation plan, IMO. I don't finance vacations. Many people do, I don't. If I can't pay cash, or pay off the CC before finance charges accumulate, I don't take the vacation. I find a cheaper alternative. There are ways to visit WDW on the cheap. There are decent onsite Value resorts as well as off-property suites that make WDW affordable for most people.
We finance a house for obvious reasons and homes are investments (well, they used to be

), cars get us to jobs that pay for our food and houses, so cars are a necessity for most. So, I don't think you can compare financing things like homes, education and cars with a Disney vacation.
It sounds like you just have to step back for a little while, weeks-months, then reassess. When you're comparing financing a vacation plan with mortgaging your house, I think you've got the Disney fog/disease/virus, whatever.
Again, I'm not saying you shouldn't go to WDW. Go. And often. But do it in a way that you can afford, in cash.