as far as i know Hertz and Advantage rent to drivers under 25 for a age difference fee of 15 bucks...cheapest out of all other rental company. Tho certain luxury vehicle are restricted to drivers under 25 but if ur looking for regular or intermediate suv, shudnt be a problem.
on my recent trip to CO i was really lucky to be able to rent an Escalade from Hertz, without paying extra age difference fee!!!! and i got a great deal on it; 4 days for 466 (including a full tank of gas). Also the Escalade was brand new with only 3.2 miles on it when we got it!!!!
edit: we are all under 25 drivers
Dude rolling in an Escalade nice, all they gave me was a goddamn tahoe and it cost me 50bucks more oh well i didnt pay for it so its all good.