Just think of the look on LEO faces when you pull up into the air after seeing the red lights in your mirror. :biggrin
I don't think it will "fly" because of all the laws and regulations here in the US. 500 miles between fillups is great on the road but maybe not so good it you have to land at an airport.
From a article on the car/plane
There are still one or two drawbacks. Getting insurance may be a little tricky and finding somewhere to take off may not be straightforward: the only place in the US in which it is legal to take off from a road is Alaska.