More girls in separate apartments would be a big step u
I like the situation where there is more than one resident in the apartment. Invisible people are good, but I also fantasize about time stopping.
It is difficult, though,
I am fantasizing about making a VR adult game version of Postal2.
Add a GYM level/map and you have to sneak into shower room/washing room that has 3 or 4 girls. The gym you could add at the bottom of the stairs for the apartment level. 😉