How do you perceive it? What do you expect? Personally, I'm looking forward to something like this: Farming drugs will take time, whether inside your home or somewhere in the forest you can work towards a product to sell.
Then you'll have to process your product, maybe it's a station back at home, a friends, or a discrete but public place.
Using drugs should provide useful benefits I.E. increased stamina, lighter recoil, decreased weapon sway; increased exp gain, etc.
Overall benefits = demand, demand = market, market = profit .. from there things can then take a direction of your choosing.
Perhaps you should be able to "brand" your product, it should show in the items "description" in a color of your choosing; Mr. Happy; Hobbit's Produce; Etc.
Enforce your territory, keep out of sight of cops, establish a brand/name for yourself, rule the streets! But idk what it'll actually be like. Thoughts?