I made two similar houses and when I got enough money, it said that Barney would liketo dsettle down in the bottom left corner. I don't see any other NPC than my guides Cole, and the message keeps appearing every once in a while. I think it might be a bug but is there a way to solve this problem in this world I am in without making a new one and hoping it works well? Any help would be appreciated, thanks.
Check that there aren't any cracks in the walls. Sometimes it's possible to leave a small gap by mistake.