closets not small....
well... i mean, it 'small' but its not like a micro grow...
And... yea, micro grows are a hobby sport, with a cheeky bonus of free weed at the end....
Its just about going all simcity on a plant and building a small world... In reality, the amount of time and money going IN to a small grow prevents it from being worth it..... You can't stealth it, because you need too much light, light makes heat, heat needs fans, fans make noise, etc...
In the end, if you cant pull at least a few ounces off a grow, its cheaper to just buy some weed...
Cabinet grows are a grey area, depends on cabinet size, and setup cost (lighting/cooling options)
anything smaller is a 'just cuz I can' grow, a small closet will work, a large closet is better, 2 closets is even better yet....
A basement room, with a floor drain and easy access to the breaker box... thats best...