He likely could find P4 offers if he wanted after next year if his goal is to move up. USU is barely above a lateral move (and that’s being generous as USU will always be 3rd in a relatively small state). They have a slightly better conference but with the way Bronco can program build I don’t think that will matter, top dog in the mountain west will have a better shot than USU at a playoff spot.
I’m doubtful Bronco will leave a rebuild process that isn’t finished (with employers and a fanbase that love him to death) to go to another rebuild with a school he has no ties to.