The way I see it is they never would have got the ACC money, so throw out whatever the ACC pays to full members. They are losing the $63 million($7 mil x 9 yrs) from the AAC tv contract plus the $17 mil in exit fees, so $80 million for a guaranteed spot in the current ACC then whatever it looks like after team leave. Also, who knows what the AAC will look like in 9 years...
As you mentioned, seems well worth that considering the boosts they will potentially get.