Tons, and you have different types, you can just rent one for a time, you can do a timeshare, where a large group owns it and you take turns using it, or if you want to go the "free" route, you can do a housing swap. Basically, you go to key west and the people in key west come to your place temporarily. Works out really good.
Anyways, you have a lot of websites to go to, but check out some of the florida sections at http://www.craigslist.org. You can look through the temp housing adds, and even post a request for temp housing or a housing swap.
I'd love to give a price, but the range is massive.
