The operative points being:

  • 15% efficiency
  • per fuel content

Quintuple the efficiency and use electricity instead of liquid fuel, and it becomes quite affordable on all points.  Cut the weight to 3/4 ton, and you get the VentureOne.

Engineer-Poet:
Looks cute, sort of like a 50 year old cover of Popular Mechanics-but if you go parking in the thing, will you need back surgery?

Looks like the model I made to get me in the BIDNESS. 'Cept the two wheels were in front.