there are two directions you can go when in campbell's situation:
1. pretty much lifetime contract at school / iowa state as long as he regularly gets 6+ wins and can get a few mulligan seasons (i.e. bill snyder, mike gundy, kirk ferentz, ...) and ability to operate the program mostly independently
2. go to blue blood and likely get fired in 2-4 years and have boosters, etc. in your business 24/7 (these programs have very unrealistic expectations so it's hard to have any long-term job security) -- you get paid more in the short term, but I don't know if you're better off long-term
what direction he wants to go depends on what he wants (and probably more importantly his wife)