1 You grab some beans that are known to consistently produce strong smoke with a good yield on top of that.
2 You bang out some stuff that's well above the average.
3 People come to you first and foremost above the guys with the mids.
4 Profit.
Also if price is an issue then don't worry about it too much. Build yourself a small bubble cloner and take cuts of all of your plants plants of your first batch. You can easily build one for 30 bucks with a small tote, some nerf darts, and an aquarium bubbler + a few feet of aquarium hosing (you really only need 2 small pieces) Then you have infinite cuts. Problem solved.
The trick is avoiding buying a "name" but getting it from a shit breeder. Not all breeder's strains are equal.