You are fine with what you are doing already with this thread. You may keep responding to me on this thread if you wish to. If you would like to, you can start each post with my name and that helps the other experts to know that you are working with me. Someone else could answer anyway, but you have the choice of which answer you prefer to go with. The choice is always with you, not us.
It is encouraging that you are starting to think about leaving. I say that because unless your husband is willing to stop all of the damaging behavior (drinking, the abuse, etc), then the chance he will continue the abuse is almost 100%. He has to see his behavior as a problem, to the point he makes a big effort to change it. So far, he is only modifying the behavior on his own and this is usually a way to get you to stay if he feels you might leave. It is part of the manipulation which is very common with abusers.
Keep working on leaving. Whenever abuse is involved, a marriage should not continue. The reason is because of the heavy toll it takes on the victims. The life long damage psychologically is enormous. The effect on the children is also hard. The children have the potential to either become abusers or be in a relationship that is abusive, repeating the pattern they were exposed to as children. When you weigh a divorce with abuse, divorce is less damaging and may even be healthier for the family. Safety and security can be restored which is vital for all involved.
If your husband is really interested in changing and keeping the family together, he can do this after you leave. You do not need to stay for this to happen. You will be able to see it with his actions, not his words. If he is truly serious, he will get sober and start therapy. It may take a while, but that is good. He needs time to make a permanent change.
If you can, try getting the children into therapy now. They need to start working on recovery. They also need to know what normal behavior is for a family and for a father and husband compared to what they are used to with their father.
I am glad you found the resources helpful. I hope they can help guide you and provide you with the support you need to get you through this difficult journey.