The way you talk, you make it sound like you've accepted 'you have no choice'. They don't make you go home; you refuse to say no to them, so travel home. Student finance loan you extra money if you live away from home, even if it's the same city.
It's a shame you think they won't support you for doing another course, but from the sounds of it, you're going to piss them off no matter what you do in life. What if they don't like your partner? Or the way you bring up your children (I'd assume you wouldn't treat them like the dirt they treat you)? Are you going to let them tell you how to raise your children, effectively raising them themselves? Are you going to keep finding partners until they approve of one, if they ever do? As for paying them back your school fees, tell them where to go. The nerve of them.
Even if you please them now, they're going to be pissed off at you for something else in the future. I guarantee you that you will look back and realise you were never going to please them. You'll realise you may as well have done as you pleased earlier in life, because the outcome was inevitable.
I'm not sure on the options available to you now in terms of finance and changing course, so it's best to see a career adviser or something.
If you're in student accommodation now, you could try your best to get a part time job and raise enough money to cover a full years rent. I think a lot of uni owned accommodation have rents for 40-44 weeks. But there is accommodation aimed at students that rent out for the full year. Or people advertising room in a shared house for the summer.
For your sake, I hope you stand up to them sooner rather than later. Even if you can't change course, it sure sounds like you could do with some freedom, so moving out would make you much happier. Good luck whatever you do.