The barnacles offer a nice choice of condo views so I suspect your new additions will find one suitable . If you can dig up a few light weight rubble pieces of coral or small shells, place them on the sand near the barnacles for easy access to a selection of doors. Leave the selection available as they seem to like to switch from time to time. Sleazy has stopped using a door completely, even during the day but my other mercs always kept one or two immediately available.