To me, a lot of the things I see on those hoarding shows are symptoms of a much larger problem. The collecting and pack ratting are all obsessive compulsive symptoms. The disinterest in personal and home hygiene are symptoms of chronic depression. The panic attacks at the thought of clearing out all the clutter are signs the person is decompensating mentally.
What I suggest is making sure the recovering hoarder gets access to the best professional mental health services available. Overcoming hoarding is not just a question of treating one particular behavior, like pack ratting or poor personal hygiene. It may be a question of getting two or three mental health professionals to address ALL of the issues at one time.