Hi Lettie, If you through car hire above and choose Budget car hire it should be fine. I arrived here few weeks ago with 3 adults 4 children, motorised wheelchair, manual wheelchair and luggage and we managed to load the car to the house with not much of a squeeze at all and the car is a lovely car to drive, would love to bring it home. You can fold down some of the seats at the back if you need to get to the house.
Only thing is if you shop like me maybe you will need to ship some people out on the way back to the airport.