Okay by the sounds of it, I've been beaten to it.
Your dad went out of his way to make the car safe, brakes aren't something you do cheaply. There is a saying "if you want something doing, then do it yourself" that way the only person you'll complain to if things go awry is yourself.
Your dad did you a favour, might not of been cheap but your dad was just being a dad - caring. He doesn't want you driving a car that can be a potential crash waiting to happen. He was being proactive in doing his job has a father.
Make sure he enjoys them beers
