I would bet that in Hud's interview here, that his "moving up" was part of his plan (and was discussed), and as a school with a budget in the bottom 5 of FBS schools, we need to be a school that up and coming coaches use as a springboard to do just that.
The key to the whole thing is that once Hud leaves, we need to hit another homerun with the next hire, and probably rinse and repeat a time or two more after that. I've seen people claim that they want to be the "Boise State of the south". Dont forget that they started with Dirk Koetter, who moved on to Arizona State. Then they hired Dan Hawkins, who kept the program moving forward, and he was lost to Colorado. Chris Petersen has stepped in from that point, and things have now gotten to the point that Boise has reached its pinnacle. And even now, teams continue to try to poach Petersen from them, but their program has gotten to a point where their successes on the field have gotten them to the point that they are being considered as an addition to a BCS conference, and their budget has reached a point where Petersen may not have to go anywhere else to make the kind of money that will keep a coach in the same place until he just really doesnt want to be there anymore.
Scott Farmer is doing the right thing here. The next part of the equation (and probably the most important part) is making another great hire when the day comes that Coach Hud moves on. Mark Hudspeth has awakened the beast (so to speak), but whoever the next guy is will be the one that will determine whether or not we continue to rise, or fall right back to where we were.