Not sure what the new business model is for Marine City airport. They used to have a fleet of rental planes, on-site flight instructor, full mechanic service and competitive fuel prices. The rental fleet is gone. No more flight instructor on-site. And fuel is $10.00/ gallon 100LL I talked to who I believe is the new manager that was in the main hangar performing an annual. He seemed very disconnected and had very little to say.