I don't think many financial experts would agree to that at all.
Let's say I average 12% from investments, which is the average yearly return of the DOW. I could make the $2000 10% down payment in cash and then place the remaining $18,000 in an investment account earning 12%. I could then finance the DVC at 7% for 10 years, since it's a fixed cost we don't have to factor in inflation, and at the end of the 10 years the DVC would be paid off and I'd still have money left in the account.
So by leveraging investments I would be able to pay less for the DVC by financing than if I had paid cash up front and saved the finance charges.
Financing is a good thing if you understand how to use it. That's why the super rich finance EVERYTHING. They NEVER pay cash.