They play in a metro of 850K, which is still rapidly growing, where they're literally the only show in town. They were well funded before, but now will even have more money at their disposal once they join the PAC-12. They've played in New Year's Day bowls on several occasions. Have had success under multiple coaches and those coaches have received big money jobs at P4 schools afterwards.
IMO Boise St. is one of the best P4 jobs for an up and coming coach. It has good brand recogninition, well funded, and proven success across multiple coaches.