Millie said in the newspaper article and on other places about how shes trying to move out and get an apartment and get settled before the baby comes but in one of their recent vlogs she's redecorating/wallpapering her bedroom at home? Clearly she's not going anywhere if she's redecorating her room. Taking into account that currently she would be unable to tour properties etc. but why redecorate when she is planning to leave as soon as possible. Someone (I'm guessing possibly Katie or one of the boys) else will get the room and then have to redecorate it again?
I think it'll be a struggle for the others living in the basement too - it seems like it'd be the quietest floor but that will change having a baby down there.