If they continue smoking, you'll have to put up with it until their lease is over.In the future, make it clear that smoking of any substance is forbidden inside any structure, including garages, storage sheds, etc.

In my case, I have residential rentals in one LLC, commercial properties in another, self storage in a third, and my real estate company operates in a fourth.

I’m thinking about  building storage units that I could sell and charge an association fee. 

In my case, I have residential rentals in one LLC, commercial properties in another, self storage in a third, and my real estate company operates in a fourth.

It's not feasible and the easiest for most people.

New to real estate investing.  I'm sixty years old and was toying with the idea of investing some of my retirement money in a home on Cape Cod.    Can I even break even if Summer rental season is a max of five months,...

This helps in making better investment decisions and assessing project feasibility.

In my case, I have residential rentals in one LLC, commercial properties in another, self storage in a third, and my real estate company operates in a fourth.

I also assume that you have an option contract, where you get to do an inspection, and general feasibility.3.

While this sounds like a win, the number of cases where it is feasible are few and far between. 1) There is an application and approval process required by the bank for the loan to be transferred.