I finally did it!

[brewer]

I think the initial conversation with dad needs to be in a public place.

Or over the internet. lol avoid face to face contact all together. My dad's not violent, just intimidating. He's always known how to make me feel like garbage.

In public you can set the rules, he can't raise his voice or be a threat and if he steps out of line you can publicly embarrass him. 

The bonus move is to stick him with the check. 

But that's just my twisted mind at work.