The mistake I made when my AS went to rehab the 1st time was let him move home.
The second time he went to rehab upon his release instead of home he went to a sober living house. There are many that are affordable. They set the rules about curfews, how many mtgs. a week must be attended, drug testing etc. It keeps the parent from having to be the warden. The conseq for breaking the rules at sober living is they get evicted, they hang out with others in recovery etc etc.