This is the most common rumored amount that I have seen. Imagine trying to match B12 $30+million not counting NCAA tournament monies.
And what will the TV contracts allow for the G5 teams coming in? Do you take their money too? If not then to get Ore and WA to the B12 level you will probably need about $20 million from the 10 other teams. Would AZ St be happy with only $18 million while AZ gets $30 million?