My guess would be 5 maybe 6 years of buy in. I don't think BYU is as concerned about money as the other schools are, they won't the exposure and the "seat at the table" in fact I think i read where your AD said something to the nature of "the money doesn't matter". All I know is BYU is a priority and the are going to want "buy in" can BYU ask for more? Yes, well Big 12 give it? Also, all schools will have to sign a Grant of Rights through the contract (no walking whenever you want).