https://freedomhauler.com/
https://www.google.com/url?sa=t&sour...IihxTh1D1rqdS8
Towing is just a matter of thinking what will work or what almost works and then making it work.
These aren't new.
A double hitched, one big caster wheel in the rear, model has been around... Maybe longer than cars have, but at least 100 years.