Or, I could just drive the cleaning person to the vehicle in question. I'd still have those 30 minutes of downtime + cleaning time, but no time returning the car to action. So maybe I lose an hour a day per cleaning (and maybe the car should be cleaned once a day regardless, nice way to keep the cleaning team engaged) BUT a self-driving car isn't a person. It can work 24 hours a day, so I'd still get 23 hours out of it.