BYU needs one FBS home game in 2018, 2019, and 2020 without any away games to give up until 2021. I suppose they could be the home team at a neutral site but that would only leave 5 home games. I was hoping USU would let BYU buy out this game which would have made things a lot easier.
Expect BYU to buy three home games from the likes of NM St or Liberty (a new FBS team next year). I don't really see any alternative unless BYU only has 5 home games those years or can find a MWC team to take a home and away with the away game 4-5 years out (which only kicks the can down the road).