I have thought of this as well because in my "neck of the woods", we have nothing when it comes to growing Marijuana or even buying.
If you are serious, I would make a business plan, logo, name, DOB license, ect...and I would not mess with too much breeding, I would just breed stable strains with the same stable strain and re-brand it (oh close your mouths, EVERYBODY steals and re-brands!)!
Also, try to sell local. Online is where the competition is heavy. You can easily corner the market locally.