I read a book in the 1980s about a girl (maybe 12yo) who’s mother was mentally ill and/or an alcoholic. They get evicted/move a lot, they were poor, she is picked on in school, she may have had a younger sibling. There was time spent telling about Mom gets a job and they get a place to live and mom is trying to make it feel like a home. Meanwhile the girl is holding her breath and waiting for everything to unravel again. I think mom goes through several unhealthy relationships. I THINK it was written in the girl’s perspective.