There are vacancies, people falling off the porch and breaking an arm, one tenant screwing around with another tenants wife, someone overdosing, finding a dead body, confronting an intruder in a STR house, normal things like that.

How fast your credit score reacts to the changes you make depends on what is influencing your credit score down but most often if it is not negative credit then it's your credit card balances are maxed out or close to being maxed out.  

Let them react as you are unchanged. 

The good news is, you can choose how you react to the ups and downs.

There are some property managers that do a fantastic job of screening tenants, and others that just take the first warm body with no recent evictions and some version of income 3x rent.

He is allergic to cat dander and the house has so much inside, in the attic, in the yard, garage and underneath the house he got instant sinus problems and severe rashes on his entire body .

I don't have a specific resource in mind, but would suggest either finding another investor who has done this or speak with a lawyer who has experience in front of your local zoning board (or equivalent body).  

I could not do it for more than a few hours and my whole body was sore the next day.So I fabricated my own grinder. 

It’s like a new born healthy baby that has all its body parts to sustain its growth but just not developed yet.

Reacting to the crowd was the strategy of the people who went bankrupt.