I'm trying a BionX setup today. They sell both 250 and 350W versions. That's at the lower end of what's available, but advanced with features like regen braking. The system I'm sort of decided on is more powerful but without regen. I'm hoping the BionX will give me an idea of the worst effort that's involved.
But yea, just maneuvering and hopping can be work. I
think I'm looking for maybe 50% pedal assist. Today will tell.
BTW, these speedbykes look like fun.

The high end 2240W (

) model can do something like 35-40mph. But then for $2500 I'd just buy another motorcycle.