I don't know where you live, but if it was me I would be back at the lawyers and get an immediate filing going for 'legal separation' wherein the Court sets a certain amount of 'child support' and 'household support' IMMEDIATELY.
He is playing with your mind and wants to have his cake (booze) and fun life style without taking care of his obligations. That is a BIG NO NO in my book, especially since it affects 'little ones' that cannot support themselves.
Other than that, ................................. has this opened your eyes? Are you ready to say "this is NOT working, has NOT been working, and isn't going to work in the future"?
I know this is hard, and it won't get easier any time soon. But, as you continue to work on YOU and your needs and the children's needs it will get better.
Love and hugs,