@Emiel1 Advance notice doesn't really work as a substitute for prep time- I used to think it could, but then I realized it doesn't. Because say you have a guest booked for the 2nd to the 6th, and another guest books on the 1st to check-in on the 7th. That guest has followed the 3 day advance notice requirement, but that still only leaves the host with one day to clean between those 2 guests.
The guests can not check in on the 7th, because the 2 days preparation settings has blocked the 7th and the 8th. Still not ideal situation, but the combination of both settings is the max. OP can get for what he wants.