I'd bet that Brohm will be gone if he has major success there. If he wins 10+ games and wins the West, he's gone. LSU would go after him when they inevitably fire Orgeron. Could see Bama going after him if Saban retires, which I think is going to happen sooner than people expect. I think it'll be really hard to keep him if he really breaks through.
As for Kiffen, I think he's going to be at FAU for a long time. He's got it made there, most of his family lives right by him, his dad has an office next to his. Joey Freshwater is single and enjoying that South Florida nightlife. Don't see him giving that gig up. He can basically do whatever he wants, doesn't have a boss there. At a big time job, he'd have to be more buttoned up. Where he's at suites his personality and "life-style" perfectly.