What "sweetheart deals"?? ND makes less TV money as an independent than if it would join the Big Ten. Purdue and Indiana make more TV money than ND right now.
ND's deal with the ACC is that it shares no ACC football money and keeps the NBC money. The NBC deal paid ND $15 million before its renewal a year or so ago. Nobody knows how much the new deal is worth per year. I hope that it is $25 million, but it is likely less than that.
ND only gets a share of the ACC minor bowl money if ND plays in one (it all goes into one common pool, then). If ND doesn't play in one, it gets no ACC bowl money.
I do agree with you on your main point, though. ND wants to stay independent for reasons other than TV money (brand, exposure, recruiting, school identity, etc..) and will not likely join a football conference unless the playoffs are limited to conference champs only.