Looks like prices are higher now, we went in June 2018, but when we went we rented it for a week and paid $26 a day. By the way they pick you up from the airport and take you to their location to pick up the car... and they will also take you to the airport when you drop off your vehicle. The vehicle was pretty old and ghetto but it was cheap, less expensive than it was to park it at the hotel each day.
By the way at the time the most basic car from the major rental car companies was $80 a day.