A few other things for Chris' list:
* There is no pre-payment penalty. If memory serves, the interest rate is the same for any term over 1 year. So, you might as well just schedule it for the full 10 years (for maximum flexibility) and make additional payments as you are able.
* The note is considered secured debt, meaning that most people can deduct the interest under the second home provisions of the tax code. Signature loans are typically not eligible for such a deduction, nor would any interest paid if a credit card is used.
* There is an Internet-based lender that will finance timeshares. I'm drawing a blank on the name at the moment. I've heard that the rate is similar to Disney's, but don't really know anything else about them.