Great effort compiling all that, but there are a few more things to consider.
I added up those contracts you posted and got 29.19 million, not 36. Maybe someone else can double check the math for us.
Garcia and Delhomme didn't make enough this year to effect the 2012 cap of the Texans. If either gets re-signed, that new money will of course count. Matt Turk made 2 million deal with Jax, but was released. We likely paid him minimum for the games he played (terms were undisclosed), which means there won't be any significant money to count towards your total. Mike Brisiel is also a free agent this year, but I don't know what he makes, I would assume around 500k.
Contracts that will be going up next year:
Andre Johnson at at 6,000,000 6,500,000
DeMeco Ryans at at 5,800,000 5,900,000
Matt Schaub at at 5,700,000 7,150,000
Antonio Smith at at 4,600,000 5,500,000
Eric Winston at at 4,500,000 5,500,000
Kevin Walter at at 3,000,000 3,500,000
Matt Leinart at at 2,500,000 3,000,000 (probably will be cut)
Wade Smith at at 1,750,000 2,000,000
Rashad Butler at at 1,017,280 1,532,720
Brian Cushing at at 774,000 1,153,000
Kareem Jackson at at 405,000 700,000
Total cost 6.389 million in escalations from those contracts alone.
There are 12 rookie deals that will all be going up 85k each this year for a total cost of 1.02 million in escalations.
Contracts going down next year:
Shaun Cody at at 3,500,000 2,250,000
Savings of 1.25 million
Contract bought out:
David Anderson WR 333,333
Savings of 333k
Wild cards - Don't know the year-to-year salaries/bonuses:
Jonathan Joseph's deal
Daniel Manning's deal
JJ Watt, Reed, Harris, etc deals
Any of these deals could go up or down. For our purposes let's assume they stay the same.
Adding up all the costs and savings I get 6.033 million in extra cost next year. Subtract that and 2 million for Turk from your 36 million and you get approximately 28 million in free capspace to work with. If the total is 29 million as I got from adding your contracts, we have only 21 million to work with. Which makes it much more difficult to sign Foster, Mario and Myers.