Does sound like cocaine with dealers involved.
Problem is we cannot help our loved ones until they admit their addiction. It’s a tough one for us waiting anxiously on the sidelines, trying to be supportive but not trying to tell them what to do and what not to. My husband is the same, says he can do what he wants. Moving house wouldn’t solve the drug problem I’m afraid, you can get drugs anywhere. My eyes are wide open nowadays.
I’m also waiting for that knock on the door. Keep yourself well you are not alone.