I would say talk with the tenant in a calm manner explaining you are the new owner/landlord and would like for him to clean up the backyard because you are trying to maintain a clean/safe environment for the neighborhood.

On your way there, take a minute to read the House Rules  - solicitations and advertisements may only be posted in the Real Estate MarketPlace; this provides folks with a pressure free environment to ask questions, discuss, and learn.

Essentially any type of building that encompasses multiple units that can be repeated in a factory environment. 

The extent of it indicates it has been in a moist environment for quite awhile.  

Having a tenant clean, rake the yard, shovel snow off the porch, cut the grass are all things that can be implied as tenant responsibilities to maintain a clean and safe environment.

The high-rate environment created a fabulous opportunity for buyers.

I am moving most of my money into more conservative investments in the economical environment we are in. 

Obviously keeping your guests in a safe environment is critical in order to avoid these issues but accidents do happen.

His opinion is that anyone who complains about the anti-landlord environment isn't operating like a business and feels there is a right way to operate in such an environment without getting hurt.

I run the NYC Airbnb Hosts Meetup, but operate my Airbnb's in Jersey City, where regulations are more favorable.At our most recent meetup, we had an attorney speak about the regulatory environment in NYC.