Thanks guys!

I will skip the climate controller for now, and will concentrate on just getting everything up and running. I think I found a cool little fan to create air movement in the room: Amazon.com: Honeywell HFT114B Oscillating Super-Turbo High-Performance 3-Speed Fan: Home Improvement. I should be able to mount this above and in front of the plants and set it to oscillate slowly. It looks like it should create a fair amount of air movement for a small unit.

I am having trouble imagining how all the ducting is going to hook up. Right now I see everything connected like this:

Code: 
  Outside Vent
       /\
       |
       /\
       |
       /\
Inline duct fan
       /\
      /  \
     /    \
    /      \
   /        \
  /\        /\
Hood    Scrubber
In this situation, is the carbon scurbber going to do anything if the majority of the air is being pulled from around the lamp? It seems like at least 50% of the air being pulled from the room is going to stink up my attic (which may or may not be a problem)

Is it fair to assume a 50% loss in cfm when using a carbon scrubber? If so, I can expect to move about 250 cubic feet of air from the cab every minute. It seems like that should be enough air exchange, assuming I allow an inlet to push cool air in.

For soil I plan to start simple and go with foxfarm ocean forest, if I can find it locally. For nutes I will use to foxfarm 3-pack (tiger bloom, big bloom, and grow big). Is this a good way to start? I am looking to start simple for my first grow.