Here is a copy of an article talking about Alabama's athletic budget, it's two years old, but gives you some insight into the budget of a big time program and how the money is spent.
Bama athletic budget
The biggest issue I see with the NIL deals is what it will do to all the other programs. As we all know football is the revenue generator that makes the money so all the other sports can exist. If you are not one of the top 30 or so blue blood programs, and if your football program loses revenue, then there are other sports that have to be cut, women's sports, and other men's programs. So all these people that had the enjoyment of playing college soccer or rowing or track and field or baseball, softball and many others, will no longer have scholarships available. And these sports will not be available to the kids that can only afford college if they receive a scholarship. Many will cease to exist. There are 10's of thousands of student athletes that participate in other sports, and if NIL destroys your football team, it takes down many other sports with it. I don't think we can deny athletes the opportunity to make money, pay them what they are worth, but there has to be some type of salary cap for a program. Also think about the limit to the number to scholarships in football, or a limit to the number of transfer portal players you can pick up or you lose a scholarship for each transfer, or you pay compensation to the school you took the player from. The whole portal thing has led to unrestricted free agency, with no compensation to the losing school, it doesn't work that way in professional sports, and that can't last or will destroy college football and many other programs with it. I don't have all the answers, but as much as hate to say it have to look at how professional sports deal with free agency, since that is what this NIL model and Transfer portal are turning college football and basketball in to.