To be clear, all car rental folks meet you at the airport. The vast majority of them have either a van, or the car you will be renting, at the airport, and they transport you a short distance to their office to sign the paperwork. On the return, most have you come by their office and pick them up, and they drive you to the airport in the car and then drop you and your luggage off. Basically all the rental places are very close to the airport, so it's not a big time difference regardless.