As long as you have the appropriate insurance it should not be an issue. In the case of Private aircraft you are no more liable for damages than if you are responsible for a road accident in your car. As with the car the owner is still part liable if he lends or hires his car to another driver/pilot and it has an accident. Under current laws any business you set up to cover high liability the director is still responsible as if they were the owner. There is very little way to escape this unless you find someone willing or stupid enough to take legal responsibility for the vehicle, this would not be cheaper than just paying for appropriate insurance. Ways to avoid big personal payouts, insure, maintain to the highest reasonable standard and don't hire to idiots.