Oh, almost forgot:
BugE Main Page Earth for Earthlings
Relatively low-priced kit, can purchase piecemeal if you want to modify-about 40 MPH for 35 miles in stock configuration, engine/battery boosts get much better results on both. Due to modular kit construction, later upgrades to stock aren't bad!
I want something more enclosed and cargo-capable for a later project, and I won't spend that much for my initial 'room for errors' design-but it might be something you could use.