I see your point, but this likely assumes a min. of four passengers. Assuming a modest 30 miles are flown per hour, this gives $4/mile x 4 pax 30 miles x 8 hrs = $3,840 per day. Obviously there is maintence, fees & fuel. I don't have a feel for on whether or not that's profitable, but feels like it could be. 30 miles could also be conservative, I'm not sure.