If we are going to talk about cost efficiency, honestly the cheapest way to go about this is growing your own. I’m not the best grower, but my bud is decent and gets the job done. Spent 100 dollars on seed in March and and currently curing about 6 ounces right now
This is the kind of dude that cannot figure why no one wants to hang out with him and thinks it’s gotta be everyone else that’s the problem, not him