Is he currently attending a 12 step group such as NA? At NA meetings, fellow addicts in recovery can help teach him the importance of self-care, including maintaining a regular sleep schedule, contributing to household duties, etc. He was in rehab for 30 days so he knows what he needs to do, but you telling/reminding him IMO probably won't due the trick. He needs to hear it from someone else, but even that is beyond your control. Many people are able to achieve recovery through 12 step alone that didn't have insurance or the ability to attend inpatient rehab. Your husband has had the gift of a month and although it hasn't worked out like y'all wanted it to, I do believe it was enough time for him to get the general idea of healthy living (because he continued it for 2 weeks after getting out).
I'll be thinking of y'all. Keep us updated.
Love,
Holly