It's not going to be near that much. As much as people like to think the SEC wants 16, they don't. Neither VT or NC St. provide the value-add needed to make the dollars work. Also, with the current playoff structure, if the SEC can't get two teams in, they aren't going to put their member schools at a greater disadvantage.
I have to disagree with 14 being better financially than 16 as 16 allows the tv networks to pick and choose the annual cross pod games (more UF v LSU, UGA v Bama, etc). Additionally, VT and NCSU can't be much worse than Mizzou even if they SEC doesn't create a Big Ten type network.
It's the issue of exponential math.
Say the SEC gets $24 million per team in the next deal for 14 teams. That's $336 million annually between Tier 1 and Tier 2. To get that split for VT and NC St., you'd need to increase the annual value of that contract by $48 million.
Now, do you think VT and NC St. increase the value by $48 million? I don't.
Well, the states of Va and NC do combine for close 20 M people but I think the biggest gain is in the scheduling flexibility pods can give a conference. The reason the networks spend billions on these contracts is for the exposure of big time games between the teams with the biggest tv draws.
Maybe Slive will come up with a creative way to get more games between the SEC East and West powers at 14 teams however they did not do it for 2012 and I take that as a sign they want 16. 
I think we're overthinking why Slive moved to 14 in the first place.
It was basically for two reasons:
1) They were falling behind other conferences in TV dollars (at that point, they were #3 behind the Big Ten and Pac-12), and they wanted to renegotiate that contract because they were locked in for 15 years.
2) Slive always salivated on getting into Texas for numerous reasons. The SEC made a run at Texas back when the SWC was falling apart, and UT declined. This was the one shot they had at making this happen, and he wasn't going to miss it. They obviously needed an even number for scheduling purposes, they made a run at VT, and they didn't get them. Hence, Missouri was the easiest to pick off.
People like Clay Travis (known idiot) think that this was a part of some grand design to create a massive Tier 3 deal, but the fact is that the SEC can't start one because Florida has a $100 million Tier 3 deal with Sun Sports in Florida, which is similar to the $300 million deal Texas has with ESPN. But it's not a part of some grand design. It was the SEC wanting to get into Texas and Virginia, and they had to settle for Texas and Missouri. They certainly aren't going to take VT and the third most popular school in North Carolina unless it's an absolute necessity.