To repeat: I am going to guess they cleared more for that game than they did for several of their earlier FBS games (Idaho). Charters are in the 100-125 range, I believe. FCS games go for about 200-250K so after charter/hotel/food there is less than they got at NDSU.
Now I do realize that NDSU made a mint of it vs any other FCS team they would've had to bring in but that isn't the topic.