Does anyone build mini rooms? I'm looking to start building them and am wanting to know where to get…

Does anyone build mini rooms? I'm looking to start building them and am wanting to know where to get them that has a ton of different rooms. I want to actually build a house room by room and not build a whole mini house. As 1 kit alone. Each kit I want to be it's own specific room and have a dust guard so I can stack them and create a house.