Disney offers 10 year loans and it is treated like a mortgage. It also does not show up on your credit which is a good thing!! And, depending on your situation, the interest is usually deductible (but have to check with a tax advisor).
The rates they charge are high--10.75% (preferred with direct debit from a checking/savings account) or 14.25% (standra with direct debit).
I also believe they have a 1 year loan but not sure about that as I didn't end up using Disney financing.
I know that there is a company that provides financing for resales as it is listed at the bottom of the daily emails that I get from the Timeshare Store.
Right now, it says their rates are 10.99%. However, I don't know the terms and whether it is for as long as 10 years or not. Someone who may have used them will chime in, I am sure.
One thing you might want to do is give the Timeshare Store (or any other DVC resale broker) a call and get the answers. I have dealt with TSS as both a buyer and seller and they were wonderful in answering questions, even before I was ready to buy.