A bareboat fleet turns a whole pontoon round in one night and a morning. Filovent describes the usual Mediterranean week: guests back by Friday 17:00, a diver on every hull, the crew off early Saturday, then all hands cleaning before the next boarding at 17:00. Crewed yachts take longer: Dockwalk quotes a captain saying a 24 hour turnaround isn't unusual now, but that maintenance decides whether it's possible.
The checklist starts from what the last crew reported and ends with a signature. For rental fleets, Reservety publishes an after-every-return list that's folded in here.