Sounds to me like your best bet is to go to Home Depot.

Buy some 4' flourescent light kits, two bulbs to a unit.

About 5 of them. That will give you 10 4 foot tubes.

Buy the highest wattage you can.

Your grow room is too big. cut it at least in half. 4X3 is plenty big enough.

Buy an inline fan unit from Home Depot in the ventilation section. You can get a 6" inline fan canister for about $21.00. This is as important as the lights so dont blow it off.

They also sell, over by the water heaters, fiberglass heat reflective foil rolls, about $20.00 per roll. You will need a few of them. Or, go to wall mart and buy a shit load of large white poster paper and tape it to the walls.

The entire area must be white or foiled.

Hang the lights on the sides and on top of the plants.

Hope this gets you started....good luck.