Your question can only be responded to with more questions. You could use a vacation club as a tax deduction for your business, however, you would have to use it solely for business purposes. Would you be using your DVC membership for you and your family? On the other hand, you can generally deduct the interest on a loan that you would personally acquire from DVC or if you took out a mortgage or 2nd mortgage to finance your DVC.
If you have any other scenarios please feel free to ask.
Sorry for your luck, I know that we would all love more tax deductions... especially at this time of the year!