So after talking with the guys I share the apartament with, we agreed to use this room you see in the pictures below, as grow room. I would like to use this thread as a work journal, to see how the project goes and receive all your suggestion to improve it. It's a nice space and has very good potential in my opinion. Notice there's a small window very useful for ducting purpouse. First part of the project: 1)Full cleaning 2)Painting all plain white inside. 3)Build a light proof sort of "screen" between the door and the grow area. I have a 9 story building in front of me and I don't want some sort of "horror movie" glowing from the door or anyone looking when I go in/out. Idea is to enter, close the door behind, and then enter grow room. 5)I have about 25 plants vegging under 400 watt, THC bomb regular seeds, so I expect in the worst scenario to came up with about the half of the actual plants. Let's say 10/12 females, I'll transfer the girls as soon as I finished the painting and light proof screen. My first plan was to go buy 2x600 watter for a kickass grow, but after a lot of thinking, and not for a budget problem, I decided to finish a complete grow indoor, with what I have, and see what happens, learning as much as I can. The outside temp is very low, a simple air intake grille I've tested is able to bring in enough fresh air to cool down temp, and a 12" pc fan attached to ducting going outside, is pulling away the "hot" air very easily. I'm placing anyway a common house fan to move air around Actually I have a 400 watt HPS plus some 4 additional 2700K CFLs (about 75 real watt with 7500 lumen each). I plan to make a scrog and see what I can get. In the next weeks/month I'll buy more powerful wattage and a proper ventilation system. Basically my project is starting with what I have and upgrading power and quality as the thing goes on. I don't want to come up wasting money, while I still have to learn a lot. Bonus pic.