Money helps... a lot, but its far from the only factor that determines success in CFB. The Big 10 and the SEC have apparently had the benefit of the infusion of money for a while now; yet, the dominant teams are the same teams that were good before the cash spigot opened up (Bama, tOSU, Clemson). I guess you can argue that UGA's recent success is an example of the cash making a difference, but UGA was always positioned to be elite in football as that state produced a ton of talent, and UGA has its pick of the best in-state prospects. UGA became dominant because they finally found a coach with a clue.
The argument that money is the determinative factor will be undeniable when a team from the SEC or Big 10 without the history dominates or at least shows that the money has allowed them to reach a new level. When Illinois or Mississippi State or Missouri or Indiana start grabbing CFP bids, then the money argument prevails. Right now, even with the SEC and Big 10 financial gains, college football hasn't changed that much: there are less than 5 teams with a shot at the Natty every year before the season begins, and everyone else is playing for a high profile bowl game. This year, does anyone think anyone other than Bama or tOSU is winning it all? If SEC or Big 10 conference money was such a massive determining factor of success why wouldn't their be more parity at least within the big money conferences? How could it be that, last year, a school like Cincy could be better than every other Big 10 team with the possible exception of tOSU and Michigan?
For years, Texas has been the most well funded program in the nation. They are the only school with their own sports network, and TX has an endless supply of donors that just can't spend money fast enough on the football proram. Yet, Texas has ONE finish in the last 11 seasons higher than #19 in the nation. Texas has lost 5 or more games in a season 9 times in the last 12 years, and one of the seasons they did not was because it was COVID shortened. Texas LOST TO KANSAS last year. Obviously, its great to be flush with cash, but there are just so many examples of the richest programs being unable to translate unlimited resources to football success.