Building a consistent winner at UL or any other G5 program is a near impossible job. There are just too many variables and head winds against you to have long term success. That said, winning a national championship at MSU or any other mid tier P5 school is just as impossible and would take a level of cheating that even SEC schools would be embarrassed by.
As for Napier, it all depends on what his endgame is. If money is the primary driver, MSU or most P5 schools are a good gig to get. Hopefully he continues to win so we can have this problem.