rental costs at the airport are 200-300% of those at non-airport rental locations.

you dont' rent cars, clearly. you are just making up nonsense. i rented cars for years before i gave up and bought a car, because owning a car was CHEAPER than renting one 2-3 times a month and dropping like $150-200 on every rental.

car renting is a PITA process. 1/3 of the time you don't even get the car you booked, you get a 'similar model'. you also need to pay for insurance would more than doubles the rental cost.