Did it lead to more damage to the furniture/property and end up lowering your ROI? 

If you give me some cross streets I can look for you at other elements such as crime, schools, rent/price trends in that area. 

Taya covered for him and lied about repairs being completed when they were not, hid real damage with the progress photos, and so much more.I paid 13k for a roof on a property last November that was never completed, when I confronted them about it, they lied and told us that it had been and took deceiving photos that hid the work that had not been completed.

This also allows for property owners to more easily write-off assets that get damaged/destroyed as the value of these assets is determined as part of the study.

A year later I found out they were scammers, who did $15,000 damage to another landlords property.

Also make sure you get his security deposit as you will need to return it to him in full when he moves out as you have no idea what the condition of the home was when he moved in (and let's face it after 24 years most damage can be considered normal wear and tear). 

The locks that I use also specify to use Alkaline because Lithium can damage the electronics in the lock. 

As long as you don't argue with them or make them mad, you should not experience more than the usual brain damage of getting permits.

The property has been vacant for awhile, and any searches I do brings me back to the damaged/vacant property and no additional info. 

If the oil runs out and results in damage to the system, the tenant will pay for the repair.I also recommend you be clear about this in your written lease for future renters.If there are repeated violations, terminate their lease and start with a new renter.