They can clean them, but I still want to go over them with protection spells, cooling spells, sun filtering spells. Also I'm ok with moving furniture and shit, but I want to move my work things first.
I had an idea about the fourth room, since you like my whip, how about a room with lots of shelves for toys, like Star Wars lightsabres and Darth Vader's helmet and you know cool stuff. I'm sure that there are things you like, even if they aren't Muggle.