Do you want a rental car or a taxi? If it's just to and from airport I'd use a taxi. Prearrange one with Arnold of AC Taxi (see sponsor page for contact info). We used him last trip - very easy.
We rented from him last October for a 1 day rental. He met us at the airport with the car and picked it up the following day at TMM. We had some errands to run so it made it more economical than hiring a taxi.