How about he agrees that if he misses 2-3 consecutive payments it is open season on his work place and personal life. I know it is regardless but maybe that will give him the push he needs and everyone can agree to back off so long as he does what he says he is going to do. He is a sociopath so unless something directly effects him personally he isnt going to care. Peter DC was the same way.
If he fucks up this time, there should be absolutely no mercy and the forum should make his life so terrible work wise he ends up on the street begging for change.