Marijuana zoning in Mass?

[Jason Turgeon]

Browsing the MLS, I've seen a few listings for commercial properties with verbage like this:

"The property falls into the Medical Marijuana Overlay District for the City of Brockton!!" 

"zoning just approved for retail cannabis store located on this parcel. additional acreage available. 3 retail marijuana licenses available."

Currently there are 13 properties on MLS that mention the word "marijuana."

I'm curious as to what the ins and outs of being a marijuana-friendly landlord in Mass might be. Is there an easy way to figure out where the zoning allows for these businesses in all of our 351 cities and towns? Does being pot-friendly give a landlord a better return, or better tenants, or some other benefit? Are there financing, legal, or security issues to consider? Are there any real estate lawyers or lenders who are specialists in this area yet? 

In short, is it worth it to pursue this as a sub market now that pot is legal in Mass and people are opening businesses around its use, sale, cultivation, testing, etc.? I'm thinking that properly done, this might change the calculus on commercial buildings in otherwise marginal areas.