I'm thinking about renting a car in SFO through HOTWIRE, but I'm concerned that I will end up paying more than if I book directly with Enterprise or Alamo For 3 weeks + 1 day (12/01/2011 - 03/02/2011 pick-up noom drop-off 4:30 am) Enterprise price for Intermediate SUV is 695.08 USD. Alamo Mid-size SUV with insiders discount and copon discont gives estimated total $591,12. HOTWIRE Mid-size SUV daily rate is $23.95 and total price is $721.83. Are Hotwire selling higher because wouldn't be neither Alamo ou Enterprise? I'd appreciate any ideas about this. Thanks!