You could take a taxi 8-10 times for the week's rental of the car.

Use the hotel shuttle from the airport, and taxi or ride with another member when you go out. More convenient and probably a money saver.

Just a comment:

If you use the hotel limousine, you will get a uniformed casino security guard as driver. If you are carrying Club money to the bank, makes you feel pretty safe . Ask a host; it might even be free if you're a Club officer.