Get a rear end from a RWD car at a junkyard. rig a bracket to bolt the beam to it.
Or borrow the axle from your trailer.
Bolt a hitch onto the other end of the beam. run some lights Instant temp trailer.
Have a chase car follow you to prevent buffoonery from other drivers.
Wildly illegal in most states, without requisite permits.
Supremenly practical if engineered correctly.
MD