dapolla,
I'm not for sure why you think that the games during the season wouldn't matter. Win your conference games/Championship and your in. Lose late in the season and drop out of consideration based on the BCS standings. Every game would still matter. This arguement is kind of like the arguement that ensued when baseball brought in the wild card. Everyone said that it would ruin the season and that winning you coference would mean nothing. What it has done has given more teams the chance to make it. The same could be said of a playoff for CFB. We could take a team like Florida that knew two weeks ago that they were out of the SECCG. Under the palyoff system, they still stood a chance to get an at-large bid, make the playoffs, and possibly still go all the way. Dont' tell me that you would rather see WV & mizzou play instead of say Oklahoma/UF or UGA/OSU.
As for the payouts. The first round could give each team $5 mil (loser)-$7 mil (winner), the second round a $10 mil (loser)-$12 mil (winner), the third round a $13 mil(loser)-$15 mil (winner, and the Champ game $17 mil (loser)-$20 mil (winner). TV revnue and sponsorship would easily cover that. Under this payout, an at large team (who won it all) could make $54 mil. It would also be conceivable to have two teams from the same conference in the Champ game. Not for sure rather that is good or bad. Good for conference, but possible bad for TV ratings.