I'm not sure why any coach would want to take the Nebraska job right now. Nebraska fans have super high expectations about the quality of their football program but fail to realize that they're no longer the powerhouse of the Big 8/12, they're an average Big Ten West team that gets their ass handed to them by Wisconsin every year.
Outside of Lincoln and Omaha, you're having to try and steal recruits from other states. Before, they essentially had to compete against the other Big 8/12 schools and a couple SWC teams from the Great Plains region, now they're trying to compete against Iowa, Wisconsin, Notre Dame, Michigan, Michigan State, Ohio State, Pittsburgh and Penn State for kids in the Great Lakes region, where Nebraska has absolutely no history or connections. Why would recruits go play for Nebraska, which seems so far away when you can play for another program that seems just as good and much closer and has history and connections there? Nebraska can definitely made into a respectable program again with it being in Lincoln, their tradition and national titles, a 90k person stadium, etc. but their fanbase demands a top tier elite team, which I think only a miracle coach could deliver to them at this point. I think that the fanbase would become very unhappy with in a matter of a couple years if they don't win the Big Ten or at least appear in the conference championship game a couple times.