Who should I contact to help two wonderful kids get out of the mold/drug infested home they are in now?

I took my friend to pick up her two sons from their home in Miami, AZ last week and they were to all stay with me while she was in town. She used to live in temp, AZ up the street from me until she received her 5th or 6th notice from CPS and they said they were going to take her kids away. Her sons went to live in Miami, AZ with their dad and she took herself and her other 3 kids to Oregon where they reside now. At her sons fathers house it was beyond a mess. There was enough trash and who knows what else under it all over the house. The father was at work but his roommate was there and he appeared to be a heavy meth/heroin user, and in the kids bedroom almost directly above their bed was a huge hole in the ceiling and there appeared to be a lot of mold forming. It also appeared that just a few good hours of rain would cave the rest of it in. I strongly advised her to take them to Oregon with her if the father would not improve their environment. She got really mad and as much as i hate to say this about my friend of 13yrs, she is not very fit herself. I have watched and participated in all 5 of her kid’s lives. I have also provided diapers groceries ect. whenever i could to help them. I love these boys and the others as if they were my own. She cannot take them to Oregon because the boyfriend and his mother do not want them there. I was going to look into trying to take custody as a non-parent but I myself am not completely financially stable enough to do so. I do not want to see them being shuffled around in foster care but at this point it may be the safest option considering what they are dealing with now. Their father does smoke a lot of marijuana and I'm not sure of anything else. However, these are really good wonderful children and the only issue with them is the oldest. The younger one qualifies as a genius and everyone raves about it so the older boy feels inadequate and has emotional and anger issues. I want to help them but I'm not sure if CPS is the right way to do so. Can someone please offer me some advice as to any other options available to ensure they are safe and more loved than they are now?