Expulsions for bad behavior were rare.For example, the school had the policy of students on financial aid were deemed unable to afford a car.

:Isn't it up to the owner to be able to decide that he doesn't want it as a behavior in his property ?

If the tenant has a respectable history of tenancy with you and you’re willing to consider allowing the pet, I like the idea of a prepaid pet cleaning fee of $250 and additional $250 refundable  (motivation for the tenant to manage their pet’s behavior) deposit.However, none of this matters if you can’t be comfortable with pets in the home.

He also harassed the Tenant in the Complex’s parking lot.The Tenant called the police about the Harasser’s behavior.

3) sending alarms about behavior and/or his choice of friends.I would give notice that any breach of lease terms will be grounds for eviction, no third chance.

And of the investors I have found so far, they don't understand the market, buying behaviors, or why they are making money.

However, id add to keep making offers...we were chosen once over others (we offered 5k above asking) because the sellers had worked with our lender of choice previously and liked their behavior. 

Look at wages/employment and consumer spending and behavior though.

The Addendum outlines proper care, vet / vaccination requirements, and behavioral expectations for the animal.

This is completely inappropriate and I have asked that Roommates A and C please write me an email containing all inappropriate behavior by Roommate B.