if he won't budge, he won't budge, I don't know your education system, but here, a person can wait a few years, live on their own and then they are assessed as an individual and can get grants on that basis.
You can't make him be a reasonable parent. Your second daughter may have to wait awhile to go to college. Is that fair? no. but she could try and get an internship at a paper or do some VSO work or....anything to get some cash and build up her CV in the meantime.
which leaves the other issue, which is your life.
