9 B12 games = 4-5 home games per year
In years with 4 home B12 games, we would need 3/3 out of conference games at home to get to 7 home games. Not a realistic expectation, especially if we’re playing an OOC P4 team each year.
In years with 5 home B12 games, we need 2/3 OOC games at home to get to 7 home games. This is realistically possible most years if we can get 2-for-1 and 1-and-done deals. To have 8 home games like you suggest, we’d need 3/3 OOC games at home.