Ok, I know that this is none of my business, but I always worry about good people getting in over their heads financially.
If you need to finance 100% of your DVC purchase (no cash out of pocket, as you stated), then this is not the right time for you to buy DVC. Yes, the promo is great right now, but this is a luxury expense and is best handled when you can afford it.
Now, maybe you can afford it and were just asking a hypothetical...then great! And please...I really don't mean to offend. I have just seen so many friends and family think that they can afford something just because they get approved for the financing.
Best wishes and I hope you make the decision that is best for you and your family