Actually, I don't think either Martin or Prince are lifers, though, I would think Martin has the possibility of staying longer. If he can coach and is successful here, it will be his program, no one else's.
Prince, I've always thought, would eventually move to the NFL. I've just always gotten the sense that he wants to be an NFL head coach, don't ask me why. The counter argument is that every coach has NFL aspirations, and while a few are even given such a chance, few succeed.
If Prince is successful (meaning he isn't fired), I could see him at K-State 10 years. Of course, the more success he has, the more opportunities he has to leave. On the other side, if Prince isn't successful, if Season 1 is the norm (7-6 record, bowl loss), I think there's going to be a strong desire to try something else.
As for Prince choosing to leave on his own, I wonder if he ever considers what he would have to accomplish at K-State to make the football program his own, and not Snyder's. Short of a national championship, I'm not sure Prince can win enough to elevate himself over Snyder in K-State football history.
In the least, what I hope Prince can do, is build on the foundation Snyder started, create some traditions that K-State is lacking in and add K-State's name to the national discourse every season. The next football head coach will be the one with the chance at immortality.
R.J.