How much, if any does the BE funnel off of that $50 mil from fox to pay for league offices, salaries, BE tournament, etc? I've always had it in my head that each team was making $3 mil per season, though I don't know if that is accurate. My point being, if those teams are not evenly splitting all of that $50 mil, and a portion of it is going to run the tournament, salaries, offices and all other conference expenses, I doubt those expenses are going to expand proportionally should the BE expand from 10 to 12. Sure, there will be some increase in expenses, but I couldn't imagine it being a bunch more, though I suppose that depends on what kind of things the conference pays for.
If I use the $3 mil per team that is stuck in my head (again I don't know if that is correct) that is $30 mil total, and $20 mil a year to run the conference (which seems way high, but I have no idea how much it costs to run the league, there may have been large initial fees to get things running and that ramps down in time). If you assume no increase in pay from Fox for going from 10 to 12, that would mean a reduction of $500k per team rather than the $900k above. On the other hand, if it is true that Fox has agreed to increase the conference payout from $50 mil to $60 mil a year, and you can safely assume that increasing the size of the league from 10 teams to 12 doesn't significantly change the money the conference needs to function, you could actually end up with an increase of money per team from what the 10 BE teams are seeing today. If you hold that $20 mil figure from above steady and split the remaining $40 mil 12 ways, you'd end up with $3.3 mil per team, an increase of $300K from what they are seeing today (again assuming that $3 mil is correct)
Obviously you have to slide things a bit if my numbers are off. I have no idea how the BE pays for its costs, but I think its safe to assume that won't change significantly with 12 teams vs 10, so the cost per team to run the conference would be less per school with 12 than 10, so there is a savings, at least in that area by increasing size. How much of a savings depends on how much it costs to run the conference.