EVAlbum: Search Results
Take a look here. For what ever you want to build there's a 99% chance someone has already made almost exactly that. Then look at what components the person used to build it with, the cost, wh/mi, range and top speed. It gives you a good idea of what is needed to meet your own goals.
Maybe an electric motorcycle would be ideal for you? simple to convert, better or equal efficiency than most electric reverse trikes.