I had considered it from the outset as I have worked for the past three years with selective distressed borrowers who can pay me for my time and negotiation skills.
I looked into becoming a PIP and established quickly that there will be no reasonable return in it for me, I have outlined on another thread on the same subject what the establishment costs are.
It will not be lucrative, far from it and there are few ways apart from the obvious that you can get as intimate with somebody than look after their personal finances, try it, ask your neighbour or a.n.other what their net take home pay is...;-)