I wrote a long answer but my browser stuck and I lost it.
short version:
get too some AA or NA (narcotics anon) mtgs so you can know how to not enable.
read these two books (get them free at the library today)
boundaries by townsend and cloud
codependent no more by melody beattie
do nothing for your daughter that she can do for herself. be there for them both when they are doing the right thing. otherwise pray for them and let them seek out some solutions for themselves.
do not pay rent as long as she is using. let her possessions go they can be replaced. been there done that 4 times with my son.
sorry your life is so hard, I can relate! my son is out of jail 9 months now. still drinking even on probation, but working.