grow room review

This will be a first attempt so I'm not really expecting anything as far as yield. I have two closets one is 26"x35" the other is 36"x40. They both have plenty of height... I was wanting to try 2-3 plants the first time I was planning on using the smallest one first then if all went well possible trying something larger for the another grow. So far this is what my plans are I probably will not be using any mylar just painting everything white. I have 12 fls 26w bulbs plus a 400w hps. I will use 3 gallon pots and pre-mixed potting soil. I have considered building a larger space however, I want to have a basic understanding and confidence of being able to complete a grow. I'll just be using a bag seed for this first experiment.
I was kind of stumped on how I would make the ventilation work inside this area, that's why I was thinking of making a cabinet. the only thing I can figure out is to run a n exhaust to the attic and for the intake using something like a dryer vent hose and run it though the crawl space to the other side of the room. Unless you guys don't think I would have a worry about ventilation in that small of a space.
I will build one of these as well for an odor neutralizer http://forums.cannabisculture.com/forums/ubbthreads.php?ubb=showflat&Number=190414#Post190414

I'm pretty tired right now, and I've probably forgot to include allot of detail in this first post. I would appreciate all positive and negative criticism

 

I feel right at home on this board with all you guys input.

 

Thanks! I'll take some pictures tonight when I get off from work. I'm still in the design mode so I have all different types of scenarios in my head