I think he could have taken his article a bit further. He says that the difference between himself and an "elite" player is 2 fewer sacks and 5 fewer pressures over 8 games. That's 4 less sacks and 10 less pressures over a 16 game season.
Now, extrapolate that out to a whole season and the entire line, and the difference of sacks/pressures becomes -20sacks/-50pressures. (Yikes!) Faneca's salary (I believe) is $8m/yr ($40m/5yr). A veteran minimum salary is (I believe) in the neighborhood of $1m.
Now, let's take a look. You have $7m to spend. If you spend that $7m on the OLine, you get +16 sacks instead of +20, and +40 pressures instead of +50. (Note: This is sacks/pressures compared to an all "elite" O-Line)
Suppose that instead you chose to spend the money somewhere else on offense. Perhaps, the reciever position. Chad Johnson, Randy Moss, and TO are all in the $7m/yr price range. Or you could have an average reciever.