With regard to the debt, I would hope there is a strategic marketing plan to strike while the proverbial iron is hot. We have a quarterback (in Tua) and a group of now sophomores that have the potential to win multiple NC's (not counting the one last season) before they leave. Tua is already being pushed by the pundits for the Heisman and currently has the best odds according to Vegas to win it. Front load this 10 year project with as much money as they can put in the coffers. Because as Jesse mentioned, the first sign of a downturn and the corporate money goes like a vapor.
If by "win multiple NCs" you mean competing for two, then OK. If Tua supplants Jalen as the starter, he's gone to the NFL after the 2019 season. You won't see him finish out his eligibility here. Ditto DeVonta Smith, Jerry Jeudy, etc., barring injury.
In my opinion, anything that takes the actual players into consideration as a determining factor -- beyond their health and well-being -- is poor business. You see this mostly when schools let players have a say in replacing a head coach. But it also comes up when schools try to capitalize on a certain player's popularity or performance. There is no less reliable, repeatable factor than whatever a teenager happens to be doing at any given moment. I think you can capitalize on Saban, but once you extend that to Tua and Co.,. you're in the danger zone if you're letting that drive $600MM decisions.