Are There Low Costs or No Costs Long Term Residential Treatment Centers for Drug and Alcohol Addictions?

Friends of mine have an adult child who has already been through short term drug and alcohol rehab (2 weeks to 30 days) treatments, only to relapse. He needs longer term treatment to address the psychological problems associated with addiction; but like millions of other Americans he has no insurance.

Is anyone aware of any long term treatment centers that may help him?