Make early check-in/late checkout upsell aware of turnover hours needed

Smart early check in and late checkout that allows to set a custom gap thats required for cleaning for each property and then lets guests on either end choose hours to check in early or check out later. E.g. one property needs 4h of cleaning, if checkout is 10 and checkin at 4, thats 6 hours. I could either allow 2 h late, or 2 h early or 1 hour on each end.