Delusional MSU fans have a long-standing run at being the most entertaining aspect of this board during the off season.
The CUSA thing was kinda fun because there was simply no way MSU would ever get an invite from the mediocrity their FB was at to what CUSA was at that time. It's almost ironic to consider what would have happened if MSU had actually gotten that invite and what has happened to CUSA since then.
The Sun Belt makes a little more sense. It's conceivable MSU could actually get an invite there. But the Sun Belt is the absolute bottom of the barrel. I suppose that's the only practical way to break into FBS FB. Sadly, the only reason the Sun Belt is in that group is so that the actual FBS schools can get 1 of the 6 FBS wins they need to be bowl eligible. I don't think the power schools really like having to pay the also-rans a million bucks just to make sure they can get a bowl invite. They'd rather do it without paying anyone.
If the upper-level administration at MSU thinks FBS FB is the best track for the future of their athletic department, then MSU is going to go that direction. If that is the case, I would speculate that none of the upper-level administration at MSU studied Accounting, Finance, or Economics.