>n auto-car may arrive with dog droppings, vomit, trash in the back seat with slashed upholstery and condom wrappers. How is that going to be managed?

Civil fines.

Record the cars under use. When people don't clean them they receive a cleaning bill at the end of the month. When they don't pay it, they don't ride.

When the car is dirty have it dispatch back to the management facility for cleaning and insurance documentation.