Sometimes we women need to put on our big girl panties and do the right thing for us, stand up and be counted and move forward with our lives.
You are in your early 50's and most likely have many years ahead of you, do you really want to spend them taking care of a drunk?
I really do not understand the finance thing as he does not work, and you do have others places to go, so is this just an excuse?
I do not know the real reason why you don't leave, all I know is that this is your life and you only have one pass thru, this is not a dress rehersal.
Have you gone to Alanon meetings? Might help you get a better grip on the situation.