Based on my experience as a Registered Nurse, I know there are issues with mental health and substance abuse, but I have not had experience from a landlord perspective.

They are simply a record keeper and will direct all inquiries of substance to qualified counsel.  

There are various provisions in the Subchapter K partnership rules that specifically tax partner property contributions to partnerships that are in substance disguised sales. 

Let's get some substance and talk specifics....sorry for the digress!

Concrete batching plants have three basic parts: A hopper - where you put in all of your ingredients for mixing together into one substance (typically sand) An agitator - which stirs up the mixture so that all components are evenly distributed throughout An outlet system - which allows you to pour out a finished productConcrete is poured into moulds made from steel bars which are transported by forklift trucks to their destination (usually construction sites).What are the Benefits of using a concrete batching plant?

Regardless of whether or not he is paying rent, you need to evict him for violating your lease, which I assume says no illicit substances, no unauthorized guests, etc.Get this tenant out legally, by following the eviction for lease violations rules of your state.

@Linda Thomas No smoking is no smoking regardless of substance, there are other ways to consume medical marijuana. 

So far rumors, which I don't disagree with, but you have something of substance yet?

I see they are doing beach nourishment in some areas, how is performing that decided?  

I think his general idea is good, but there isn't any real substance to his books.