sorry that you are going through this, you sound so caring. seems like you've done all you know how to do, but unfortunately there is nothing more you can do, the rest is up to your mom. there is always hope. maybe its time for you to turn all of this over to your hp, and began doing things that will help you to feel better. its hard to watch someone you love go through all of this.
i pray that she don't have to lose the job or her husband, but its likely that she will eventually if she don't decide to do what she needs to do to help herself. sometimes we have to stand back and allow them to suffer the consequences of their own actions, before they realize that they really need help. try to focus more on you and allow your mom to do the same. there are alanon and naranon meetings that you can go to that are good for family members, hope maybe you can find some in your area.