Unknown or erroneous title on single axle fifth wheel

I was imagining something more in the line of this



Cut it off where the little girl is standing and locate a single axle under it about where the second side reflector is. Make it small, nimble and high profile to get you where TCs generally wander.

A huge toy hauler kind off defeats the purpose of having a TC in my mind. But them again, so does most any type of trailer