4 people from slovenia are planning a trip in usa.
we are planning to rent a car: our pick-up location will be san francisco (we prefer to pick-up the car in the city because is more cheaper than in airport) and drop-off location chicago (also in city).
we are going to rent a car for 21 days from 7.May to 28.May 2009 (we are planning to do ROUTE 66). And because our drop-off location will be different, you must pay also for extra money.
so I'm asking for advices which car rental agency has the lower price for renting a car, and what category of car would you reccomend me for this trip (ROUTE 66 for 4 people).