Another question of some interest is how much is involved in setting up a H&A series with another program. I know some (not folks here) think an AD calls another AD and in five minutes they agree to one in 2028-2029, done. My impression is it's not that easy, at all. Obviously, the schedules have to match in terms of openings and any other OOC games already slated. One AD may already be talking to another P5 team. Then there is date availability of course. SEC teams tend to have openings later in the season (usually for a sampling at the bakery shop), while B1G teams tend to play OOC games in the first three weeks. (UGA starts next year off against Vandy, a conference game).
SO, let's be the AD for say Wisconsin and UGA. UGA has openings in the years 2021, 2023, and 2027. Do those years match up with Wisconsin's? (I excluded years where two P5 teams are already scheduled.) Probably not. Then there are penalty clauses to hash out, TV perhaps, OK from the league office (?), and who knows what else.
