Hon, if you leave slowly, they may never have to 'deal' with you. Your relationship with your parents will probably never be the same as when you were with them, but if you do it right they may not shun you. It will be hard on your father for sure, since he is an elder and his kids are supposed to be 'exemplary' and it may put him in an uncomfortable position later. But if you are out of the house, and leave slowly, they may not shun you and if you are out of the house he may not suffer too many consequences. It will be a long process, if you don't want to lose them. Others have been more upfront and ripped the bandaid off, for complete independence, with mixed results.
P.s. I'm glad your dad listened to you on cutting back! That's a good sign.