I agree you are going to want to look at multiple units, rather than a Grand Villa. GV's are going to be very difficult to get in the best of circumstances.
Also, I hate to be the one to rain on your parade, but a group of ten (presumably a family gathering?) is hardly a
DVC owner's dream rental. We see all sorts of threads here about
our own family members canceling out of long- and extensively-planned vacations and leaving the owner in the lurch. A large group rental is extremely risky for the DVC owner, and I find it hard to imagine an owner renting for a group like that...but stranger things have happened.
In addition to a
DVC rental, I'd look at regular CRO reservations, and I'd also look offsite.
Those options may not actually be more expensive than a DVC rental, depending on when you are going. The thing that makes DVC tough sometimes is that Friday and Saturday night stays are about double the Sun-Thurs point costs, and that drives the overall price
way up. You didn't say when you're going, or how long you're staying, but if there is a weekend in your plans, DVC may not be the way to go.