LoL PR I got sucked in by the "EVERYONE LISTEN UP!". I was kinda interested in who had the nads to title a thread begining with that since it was post #1.
I did somemore thinking about this since I constantly try to figure out different senarios to try and keep brain busy as I get bored extremely easy. 4x6x7 room, so the tallest the plant(s) can be is aprox 4' tall out of a 2 gal bucket (using sizes that I used since I have no clue what you plan on doing). Min 1 sq ft per plant for growing, only prob with the min is trying to get in and tend the plants. Using a 400w HPS light is only going to cover aprox 4x4 so right out of the gate you have lost 8 sq ft unless a light rail is used but then again the budget is not going to cover that. We are now down to 4x4x7. 400w is only going to penetrate so far down into the plant unless some dedicated trimming is done so lets change the max height of plant to 3ft to ensure light penetration to a certain point. When I was using my tent as an actual grow space the best number of plants I came up with in a 4x4x7 space is 5. That was DWC in 5gal buckets, 400w MH/HPS and around 2 years of growing. IMO where you have to start planning a room isn't the yeild size u want or how much space you have available it is how big and how many lights. When you know this then you can plan space needed and est what yeild will be. Here are my predictions and my thoughts on what you could do. 400W HPS = 4x4 footprint of light. Dont know if u are doing soil or Hydro so since I live in the water I would do a DWC grow to keep expenses down. 5 plants started from seed so your gonna wanna start atleast 8 seeds to allow for mishaps. Veg until about 1' to 1 1/2' tall then fim then so they will bush out some. As for strain you and I would be shopping at different ends of the aisle on this one. You are looking for quantity and I grow for quality. Whats the sence in having a pound of smoke that has a very low THC level when you can have half a pound of smoke that will give you better personal results with less herb being used. I'm not going any further than I have already since I still find it a little strange that someone comes out of nowhere with a request like this on their first post. If you have been searching for answers on your own all I can say is you have been looking in the wrong places. It is amazing what you can find when you Google