This is key.
Fargo will build a new dome someday and it will be big enough for FBS.
With that said, SDSU and/or USD likely won't have money and/or population to keep up with NDSU, it's a better long term strategy to align with local schools that are similar to UND.
UND really has no business being in a conference with two California teams.
Florida State University is closer to Grand Forks.