If I were in your situation I would really have to take a step back and prioritise, what is more important. The house I grew up in or ME.
Your sanity and your happiness should be more important to you than bricks and mortar. You will still have your memories but you can't change your Mum, Sister or Brother, they're addicts and you have no control over whether they seek help for themselves.
Sounds like you're reaching the point where it's jump and save your self or sink with them.