Agree with Alexy, call the dealer. They probably have a free loaner car, or can connect you with a rental.
For what it's worth, they have rental cars available at Dare Co Regional Airport in Manteo. I've rented cars from them on multiple occasions. I think it is actually a local dealer who provides the car and it was $50/day and parked right in the airport lot.
I wish they had those there when I used to fly in to MQI. I was toying with the idea of getting a clunker and just parking it there but looked into the insurance and scrapped that idea. Then I looked for someone that had a clunker parked there and offered to drive it to charge the battery and put gas in it but found no takers. There were maybe 10-15 cars parked there for pilots when they flew in. Their pockets were deeper than mine.
I have found that Soundside Auto, just over the bridge into Currituck, does a great job on most repairs
I had the same issue down here in Frisco and ended up buying a beater Grand Cherokee with a solar panel in the dash. It was cheap enough that it only raised my insurance rates $100 a year. I'd love to split the costs on a car with other folks, but it seems like everyone flies in at the same time.