[Frank Lee]

The "steering" situation could be problematic.

One wheel trailers "caster" that wheel. Right now, I don't see an easy way to put power through a castering wheel, especially if it sees torque in both directions i.e. regen capability.

The location of the wheel out behind the rear axle by that distance would make steering or castering a necessity I would think. Perhaps a linkage could be affixed to the chassis for steering? It's an extra complexity but surely not insurmountable. The plus side is, it could have some boattailing bodywork.

Or, since trucks are usually so high up, the receiver mount could extend forward instead of backward, positioning the wheel as close to axle centerline as possible. That might minimize scrub to a degree that allows a fixed non-castering/steering mount. I don't know. Tucking all that stuff underneath would probably cause problems too.

Two wheeled trailer starting to look good again. :/