If this is an endowment and not something that can be spent, it’s probably reasonable to believe BYU’s annual NiL fund is around $13M a year with the following assumptions:
$100M invested fund only for football NIL
$8M from an 8% return (this is reasonable now but probably closer to 6% in historical years)
$5M new contributions that can be spent (no idea, just a guess)
So that’s $13M/yr compared to the biggest programs that are over $20M