I'm glad that you're considering protecting your children from her destruction.
Using a bartering system to get people to treat their alcoholism is fruitless. She will not get and stay sober until she wants to, and how many different ways can she possibly tell you and show you that she DOES NOT feel her drinking is a problem. Period. Whether or not you want to live with an active alcoholic, is your choice.. of course, but I'm happy to read that you're beginning to think of your childrens' well being..you know it IS more important than pretty much anything else in this situation..
When my addiction(s) were active, I promised and begged and pleaded to end them over and over again to keep my husband around. I just got better at hiding stuff.. or manipulating him into believing I didn't have a problem anymore so I could continue getting f'd up.