I think they have a hope of working as Dayjet plans around Florida if their numbers hold up to reality. If they can keep the price low to go direct from one smaller place to another they may bring in the business men who are on day trips. If they want to go to high density airports (even high density GA airports like TEB) they are going to have some problems with giant ramp fees even with buying fuel since the FBOs won't make the money they need for the ramp space on fuel alone. A ramp fee of a few hundred dollars will throw the economics of the VLJ out the window. Those fees will raise and happen at more and more places as the ramps get more and more full with more airplanes.
This is a exellent point that I didn't think about. They won't take enough gas to get the ramp fees wavied at busier airports. This is deal killer in some cases.