I can't say this enough but the vast majority of DVC owners have no business owning. They can yell, rant, flame me, whatever they want it is true. If you can't pay cash comfortably then the money likely could be used elsewhere.
OP, go with the mutual fund.
I agree 100%.
When I read comments where people ask what the intrest rate will be, or wonder if the loan will be approved, I cringe.