I think there is hope for your husband if he wants to quite some day.
A bit like going back to school. It is possible to go back to school,get a (new) diploma,
get a different job,etc. But is he interested?? Is it what he wants?
I remember spending hours researching treatment options and neglecting my little girl in order to do so; her dad was not interested in treatment. Or not ready. I left him a year ago.