I cant speak for the National/Enterprise counter at TTN or Avis/Budget at ILG. But the Avis/Budget counter at the TTN general avation bldg (which offers a shuttle from the commerical terminal) says they do stay open if they have a customer on a delayed flight. The car rentals have an interest in TTN/ILG becoming popular too, it means more business for them but yeah the Quality Inn does need to get torn down. They do need space primarily for parking if flights were to expand. They have room for taxis and another rental or airline counter.