Do the rental car place have a large selection of cars or will I have to travel elsewhere for a rental?

I would not go directly to rent a car, to make sure I have available a car with the needs that each person has, I prefer to book for some online booking page

Well organized

All rental companies are on site.

Yes, this place have many options...

Use one of the 11 on-site companies and you will get your car at the airport without taking a bus to an off-site location.

Great idea berny