Agree and I do think Notre Dame could make even more in the B1G.
They wouldn't have to worry about NBC contract as they could arrange something with NBC and the B1G to make that happen since NBC has both.
Regarding ACC GORs, I am not sure it is as strong as a normal GOR and I think the buy-out would be significantly less than an actually ACC team and even less than what OU/Texas faced with the Big12. Even then, they could probably compromise and keep a couple of OOC games with the ACC matched with a buy-out to make it happen as I imagine Notre Dame would still want to play Boston College and perhaps other Northeastern ACC schools like Pittsburgh or Syracuse.