Okay assuming you mean 4'x4' wide 6' tall. I would go with 6 5 gallon pots now this wont give you any room to work around the plant's but it will be very simple and not necessary, with low plant numbers proper inoculation and thorough lolly poping your S.C.R.O.G could be great. Although I do not recommend a S.C.R.O.G because you could have a higher yield with more plant's and a MUCH quicker turn around compared to the S.C.R.O.G. Also without knowing your budget I cannot really be specific yet as to what type of setup you should purchase. Ideally you would run a 1000w HPS lumatek it's great because you can run it on 600w, as for reflectors go with Ajust-A-Wing's sealed reflectors are cool and all but there more for production setups that are running them and cooling in tandem not for your small tent, you would just get a 6'' fan to cool it easily. For your your medium and nutrient's I would go with coco coir because it is as simple as soil yet still hydroponics you could get a drip feed and automate the feeding and watering. Aero-ponics and other hydro systems like ebb and flow are not very forgiving to newbies because with any mistake like your mister goes out your plant's will be dead more so with the aero-ponics than the ebb and flow or dwc. Nutes you should be running are a base of either Humboldt, Botanicare , Canna , Soul Synthetics. Botanicare however are the most cost effective, you get great result's with low money Cns-17 or Pure blend pro grow are probably your best option for base veg nutes also Botanicare has most of your additive's. Your going to wan't to add some humboldt myco madness and great white shark for beneficial's in the beginning at least. For Blooming I would go with Botanicare Cns-17 bloom as a base. Now as for Advanced nutrients the only things you should use them for is rockwool prep for clones with Sensi A and B, also for your bloom additives AN is a little more comprehensive although don't get the idea that if you pay double for a full AN line your going to get double yield and double quality. The reason I don't use Botanicare or any other for flowering additive's is because AN provides quality as well as being cost effective on this front. Your going to want to run the Bud Candy as well as Big bud, Overdrive, and Final phase. Stay away from the other an products such as voodoo juice Kushie kush Rhino skin especially. Voodoo juice is not to be mistaken with Iguana juice that I support the use of but don't use myself, it is basically 100% organic but not O.M.R.I. approved just because everyone hate's AN. Some other things to think about is if you are going to do in house cloning or get clones from some other resource that you have. It is strictly advised that you do not grow from seed every time as it will greatly increase turn around time. Co2,?, are you planning on running Co2 because that could be hard considering you are going to have circulated cooling so the air exchange will be drawing cool air in from outside and hot air from inside to out, the point being the Co2 will just be blown out. Good luck and let me know if you have any question's feel free to pm me but I will also be keeping an eye on your thread.