This may not be a practical answer, but can you self administer a rapid drug screen to your prospective tenants. 

However, I have heard horror stories about the homeless that can park out there and the police not coming to assist, gunshots, disrespect for your property, human waste lying around, and drug houses, and more.

@Brian Garlington I just reviewed a lease with the clause permitted reasons for eviction “such as non-payment of rent, breach of lease, damaging premises, drug or other illegal activity, disorderly conduct, rehabilitation of unit, landlord or relative occupancy.”In speaking with an agent he too was under the impression a buyer (landlord) could move into the unit they were purchasing, so I’m wondering if there were 4 owners could they all 4 move into a 4-plex and effectively require the tenants (on month to month leases) to move out?

However the tenants that are acting crazy and dealing drugs out of their apartment, we are stuck with unpaid balance and cannot wait to get them out. 

Two days later he was arrested on drug charges.I shared all this with my staff as it happened.

Drug dealer across the street, a lot of shooting in a street behind it is located in Columbus Ohio.

Tenant acknowledges that this is a crime-free/drug-free property...a conviction is not required...

I had a tenant who had the drug task force with 14 law enforcement agencies perform a raid on there rental which recovered items that lead to more than 2 dozen felonies.

The area isn't awful but is known for some crime and drug activity, and is a lower income working class neighborhood.

These are often tenants who have allowed uncle Billy Bob who just got out of prison for drug sales to move in with them without notifying the landlord.Make sure that you follow the requirement for your state on how much time to notify the tenant regarding these checks prior to entering the rental unit.