You can set up an entire grow for under $20 in material?
I don't think so. I mean, just the basic building material cost would be more than $20 unless you are using reclaimed wood or reusing old equipment. This $20 number could be misleading to a new member, for it will surely cost more than $20.
You are very hostile, which doesn't make you right.
People are allowed to disagree with you, there can be more than one right answer, and you should feel ok about yourself if you turn out to be wrong.
No one is attacking you as a person, or they weren't until you decided it was a good time to whip out your dick and start measuring.
Do you know what people on here respect? Measurement and math, not conjecture.
All you are offering is conjecture since you "don't take pics"
, which means either you grow super shit plants and shouldn't give advice (which is what everyone suspects), OR (even worse) you never took the time to learn how to properly protect yourself and remove data from pictures.