Be tough to try and compete with a flurry of black market growers/dealers turn businessmen/women along with everyone else joining in. I'd dodge the crowd and find a niche market within the whole legal marijuana sales.
Reefer Madness museum next to the best pot shops in the tourist areas? Locals will get tired of you, gotta have new people getting off the train regularly.
Get a CNC and start making your own grinders. Put local shops logos and them, sell them to that shop, etc.
If it isn't fun, dont do it. Being in business for yourself isn't anything like working for someone.