Gotta be a difficult decision. Chance to cash in with life-changing money, but knowing that you're signing up for a horrendous situation. That said, if Oats is the coach we think he is, he may turn that program around and continue to move up the ladder.
Alternative: wait one more year, hopefully achieve the same level of success, potentially receive a better offer at a more stable program which would not represent a Herculean task to turn around. Downside- let's say we have a rash of injuries and the wheels come off. What if this opportunity never comes again?
On the administrative side, just hope they have a plan of succession to allow our program to continue to grow.