I haven't used any of these yet, by the way. My PI's car is just parked with the other cars, since she has plenty of other objects for the mausoleum. I was just wondering how it would work if I had a police Sim or a chef later. The playable ghosts seem to use stairs (so far, at least) but unplayable ones will sink through floors, so could certainly use appliances anywhere on the lot, even on a level with no access.