It's kind of hard to undercut the price of a plant that you can grow in your own back yard.
That is true, right up until some MS13 gangbanger cartel types find out you’re growing on “their turf”, then it’s either buy from them, grow for them, sell for them, or you and your family are dead.
That is not hyperbole or exaggeration. That is how these people operate, and they are very good at it.