@Eder Aldana, @John Jacobus covered all resources that I am aware of.

The message contained pictures of each property from the street to demonstrate they were still standing.Unfortunately, this is not the same story my residents told.My real estate agent was given information by a residents that their home had a notable leak in the bathroom.

Is your new investment making enough to cover these loses and still be making you a good ammount of return?

Covers all expensesHere is a iink that may interest you, one of my recent cash cows. https://www.biggerpockets.com/forums/311/topics/624369-my-little-cash-cow-in-detroit

That will give you a clear picture of what's going on around. 

Cover yourself legally by making it a uniform "reassessment" of ALL your tenants and make uniform decisions based on a written criteria that you use for ALL the tenants...not just himNo way in hell am I letting this guy stay.

That's hard to say from the information provided as we don't know your whole financial picture. 

I am currently renting out three of the rooms which covers the full mortgage and I live in the 4th room (So house hacking).

Just want to understand that if you have a long term rental property, would’nt you buy new (cheaper) appliances and get a multi year (say 5yr) cover?

I had a tenant who insisted on smoking blunts in his bedroom, the deposit was more than the cost of repainting the room so he covered the cost of new paint for the next tenant.