Bo's kids are still young, still in school, and he's home around family now.
Nebraska is still paying Bo the remainder of his buyout, meaning he's still earning around $3 million/year while working at a relatively stress-free job at YSU. That continues through February, 2019.
I think it's highly unlikely that Bo moves on from Youngstown State for a couple more seasons.
All of that makes sense. But considering the low contract he agreed to at YSU, I wouldn't be surprised if he sees Purdue as an opportunity to doubly screw over NU. Accept a low figure contract so we're still paying him, AND he has the chance to play us and spoil our season frequently.
The buyout stipulates that any contract Bo signs has to be fair market value. So he couldn't, for example, take $50,000 a year from Youngstown State and force Nebraska to fork over the balance of his $3 million per year.
If he takes the Purdue job he'd have to make somewhere in the neighborhood of $1.5 - $2 million or UNL will cry foul.