Car rental under 21?

Im not sure if this is a GQ, or more of an MPSIMS matter. Ill try it out here first.

Beginning of December, Im flying into Tallahassee, FL for 2 weeks. Im looking to get a rental car for my visit, so I have freedom. The problem Im running into is that few companies rent to under 25, and those who do, are 21+. I’m 20. All of the major car rental agencies declined me… Does anyone know of a smaller, local chain or agency that would rent to 18+?

Or, does anyone in the Tallahassee area have a car they’re not using that I can rent? Im desperate…if I cant find a rental car, it screws up my trip, and my airline ticket is nonrefundable. Any advice?