The concern would be if it were too few games or too low of $$$ it wouldn't be worth it for Hawaii. But I think 6 home games against P5 opponents is probably great for them.
I do think it makes more than $8M back though. Keep in mind that EVERY team playing Hawaii gets a Week 0 game, doesn't have to be Hawaii that week. So being able to show Auburn/Oregon in Week 0 with no other games opposing it? or Michigan/Washington? Or even Baylor/Utah or Florida/Utah? That's worth a lot.