Hmmm...sounds like more husband issues than anything else. I am also wondering what he has told the SIL and MIL that you don't know about. I would say #1 that he stole money that you worked hard for. That he ran and talked crap about you to his family. Tells you that you are not family. He drinks and smokes pot.
Maybe your issue needs to be a lot more with your H than his family. Not saying they don't have issues, but am saying he is likely the stem of those issues in a lot of ways.
Good luck no matter what you decide. As it was said, you do have choices.