That's a tough one. I am concerned that now that some states are okaying marijuana use, trying to stop young people from using it is going to get tougher and tougher.
He still might need consequences after inpatient treatment, I fear. I am sorry to be a downer. I am concerned that my young adult son is going to start using, if he hasn't already.
Have you considered going into therapy yourself? A therapist can help us parents by giving support for setting consequences. I wish your husband would be able to get some support, too.