I believe he said they would need a different stadium(remodeled one near campus) in place for the move.
I don't think it'll happen. He seems pretty confident in it, most other folks are very skeptical.
And if UND was FBS, and asked NDSU to play a neutral site game while NDSU was FCS, I think it'd be silly to turn down. That'd be a way bigger coup than getting them to go to Fargo twice while both schools are fcs.
Again, I don't see any of this happening. But I'm a 22 year old with zero control over any of that.