I have ac, dehumidifier, fans and vents.. just want to build a room for more control, rn it's just in open basement. Temps run 71 -78 with trying to keep whole basement cool and dry.. humidity is around 50% but I have multiple stages of plants so I want to fine tune each for what they needI'd suggest thinking about ventilation, cooling, and (de)humidification upfront.
What's your grow experience and location / climate?
If you've grown before, you'll have a sense of those.
But if you're new(ish), then my next question would be:
Will you have an exterior exhaust for ventilation?
Yes I think I do bc I want to run multiple stages of growth so I'm not in trim jail too much at once!!! Lmao.. I'm a single father so I work my ass off last thing I want to do is turn this into a job, I absolutely love growing this plant.. my tri cross is about to finish in the next cpl wks I can wait!!That's plenty of space for two "rooms" !
Least expensive would be 2x2 framing and 4'x8'x3/4" foil backed foam insulation panels for the walls, they are about $17 each here.
Light is next, 5' x 5' is a good size for four plants. I have mine on rolling castors, makes it easier for watering, training, etc.
Ideally you will need +30w/sq ft, = 780w but a Mars Hydro FC-E4800 would do nicely ! Independent test and review here .
I'm in the process of moving from HID to LED and this light has the best par values and light spread for the buck compared to my current 600w MH/HPS bulb.
FWIW, I grow in 5 gallon pails with GroBuckets, ProMix HP and Mega Crop one part.
I use light weight panels to create an up to 5'x5'x4' high enclosure inside a 10'x10'x8' high room.
Depending on the strains I harvest between two to three Pounds per grow, do you need TWO rooms ?
Cheers