Hyroot, I'm currently helping my cousin out and he uses bottles, almost exclusively. I unscrew the couple caps and throw it into a measuring cup, do it with about 3-7 different bottles, then it takes me about 1 or 2 tries to lower the pH, You're right, about 20 minutes to setup and 20 minutes to water them all(depending how many you got running). But that's all I do... Take off dead/yellow leaves, rotate, foliar and that feeding/watering regimen. Let me repeat that again, that's ALL I DO for these plants. Zilch, nada, finito.
Really sit back and let that sink in for a second, now think about all the love you've show your plants and all the things you've gone through to make them happy and time taken to figure out what can make them happier.
It doesn't even compare, I'm trying my hardest to make him switch to a more organic method, and he refuses, there's less dead/yellow leaves involved, less pests, healthier plants, less money once you got everything rolling(bins, tea brewers), ect..
But don't kid yourself... one way is akin to pumping an IV full of chemicals from a doctor into a person, the other is like slowly nourishing growing toddlers...
To people like him, it's all about money, yield, and ease of use, in that order. To people like you, it's more about quality and quality of life. You grow medicine, he grows money trees. People like you fight pest organically, most people using full bottle programs tend to lean towards the avid and pyrethrin bombs.
It's 2 different worlds my man, apples and oranges. I took such a liking to doing this which is why I'm trying to get some bins and brewers running, it's the right way to do it, but it's definitely not the easier way to do it.