@Tidegirl if you live anywhere near me rehab is free in Ontario and could be supplemented by insurance or in Canada's case another province. It costs like 30,000$ a month. Its serious cash if its not free. Sounds like thats unaffordable at this point unless you are canadian.
I am severely sad about the situation you are in with your father, my father is 71 and will be getting ill eventually but actually still continues to work. Follow your gut (other than drinking).