@toolbear long story, but actually did wind up with something like this in practice by accident . . .
Had a car that was so beat up it wasn't worth selling. A friend and I, after having sold it to each other in times of need for $50, then just started loaning it long term to people who didn't have a car, with the ask that they just pass it on when done.
Worked well through like 4 people until a drunk lost it in San Francisco.