You can probably rent for a week and not pay anymore than you would for 5 days under a lifestyle visit. We are renting this summer for the same reason, summer rates are very good. I'm sure the cost would'nt be that much more. Ask your owner you rent from if they are offering to get you pass while you are there, most of them seem to do that, and most of the weekly rentals come with golf carts. Go to
http://www.thevillages4rent.com and look around.
Lee and Richard in Tampa, for now.