Don't feel guilty about not being able to provide the rehab.
When my son said he was ready, we set him up in an IOP and paid for that. He learned all about the recovery process and was introduced to NA/AA principles.
Since then, each time he has relapsed and decided to get back on the wagon, he knew exactly where to go and who to call.
Some of his longest relapses were directly related to how long it took for me to ask him to move out. Weird huh?