I heard Salvation Army has a free and VERY good program. Also check out Valley Hope Association. It is still expensive without ins, but about 1/2 the cost of the traditional rehabs and a very effective program. I think they will work with you on payments, but if your addict isn't serious about getting sober it won't work. It isn't a typical institutional type rehab. They have rules but give patients enough rope to mess up if they aren't serious... and they are promptly kicked out. It is more a structured and supportive environment who really want to recover and transition back into society.. maybe slowly, thru a 1/2 way or 3/4 way house, a different place altogether, but they are non profit and it is what has worked so far for my RAS, 4 mo sober. They do help you find 1/2 and 3/4 houses if that is what is best for one leaving an inpatient center.
Good luck to you, my friend.