Looks good. You should go pick up some some foil tape from home depot. I buy the pro stuff it's $16 a roll but extremely worth it, its the one with all the weird stuff printed on it. So much easier to work with.
Something like this is your best bet.
http://www.sunlightsupply.com/p-14497-ideal-air-dual-hose-portable-ac-12000-btu.aspx
Drill two 6 inch holes, in your wall or attic or whatever, pull some insulated ducting down through the one room, into your grow room, and hook up the two hoses to the two...
Your gardener must be pretty awesome.
Did you ever get that room together that you posted the schematics for? That is like blueprint porn for me, I think of it often when I imagine the 'perfect' setup.
Sounds tight.
I was reading it, and thinking "why would you use dual lamp reflectors? why wouldn't you just do a couple hoods next to eachother?"
Then I read in a 600w HPS and 400w MH. I get it now, that's pretty cool. Dual spectrum 1000w, from one source for even lighting.
A couple things...
Way too much space for that light, and use regular or feminized genetics in that room. You could do two 1000w. Or just buy a tent for your 400w in that room, or buy a tent for a 1000w and you still have half the room to put shit in.
I'd say it's something close. 12,000 btu ac, sealed room, 8gal per day dehumidifier, atlas 3, hortilux bulbs, scrogged plants, 8 inch max fan running air through the hoods :).