Dave Jackson,
Regardless of what we kibitzers here may think and ponder, the credit goes to the guy who builds and flys the machine! Go and do it, and tell us how it went.
I suggest a scale model, with a good rc system and a tie down phase as a great way to model the aerodynamics. A pair of electric motors (with a simple synch gear set to maintain order) could serve as the power plant. You could measure power consumed through the tether/feed line as you test it.
Good luck
