The funny thing is about that 1000 plant "stealth grow underground, made the entire 4 block area above ground smell like straight dank, cops ended up busting the dude. Covered it with a legit edible mushroom farm that was 4000 square feet. Behind the secret walls, a 1000 plant grow haha. Plus like 700 lbs of already bricked up ready to ships shit.
Small grows like this to keep stealth, shit no problem. Something that consist of 1000 plant, possible, but most would never get enough and proper ventalition.