Here is a list of MW coaches (including the new ones) that are in my opinion how stable they are.

Long term:
Bohl - Wyoming (school fits his personality, been at Nebraska before. Just sign a 7 year contract)
Long - SDSU (Nowhere else to really go at his age and don't think he want a P5 schools job)
Davie - New Mexico (been there, done that....glad to have a second chance at coaching and happy to be where he is at his age)
Calhoun - Air Force (nothing to say....he is an AF grad and is happy....though triple option coaches aren't needed in P5 programs)
Wells - Utah St (After how Gary Andersen has bounce around, I think he'll be happy coaching at USU for quite some time.)
 
50/50:
Rolovich - Hawaii (he's 37 and coaching at his alma mater, he could be hungry to coach at a P5 school after getting Hawaii back to its winning ways)
Brennan - San Jose St (he's 43, a SJSU hometown boy & gets a crack at to coach. May have aspirations of a P5 job if he gets successful with SJSU)
Tedford - Fresno St. (he's 55, now coaching for his alma mater, coached for Cal, may not have a desire to coach at a P5 school again)
Harsin - Boise St (changed status after Oregon interview, although I think he'll leave if the right fit P5 school was available and not just any)
Norvell - Nevada (he 53 and his first head coach gig.  He been around the circuit of the NFL and P5 schools. Could be the right person to stick around if successful)
 
Flight Risk:
Sanchez - UNLV (he's 42 and hungry for success and seems to have the desire to being want to coach at a higher level)
Bobo - Colorado St (he's 42 and was OC at Georgia, seems to want to coach in the SEC someday soon after using CSU as a stepping stone)