Hey man, you could make your own carbon filters and/or cool tube with a reflector.. The store bought stuff will probally be more legit but if you got some time you could see what you can piece together there are some damn good tutorials all over the net.

Are you going to have a veg room, a dark room, and a light room or hows your set up going to be planned out? What style grow are you going for, normal sized plants, monsters, SOG or what? With a dark room you can put your plants in at night, or a light slider you can use half the light and have the same amount of bud flowering..

So many options man, it's mind boggling... Wish I had a good place for indoor.

EDIT: I've read molasses and nutrients are cool @ the same time, just be careful not to feed em too many nutes.