First off  you have a CRIME FREE /Drug Free addendum on each tenant that lives in your rental.If you notice suspicious activity or have reports of the same you give tenant notice of high traffic / volume of people to unit as notice to cure.. if this continues or you see or smell drugs you give notice of non-compliance and lease termination. yes you can ask police for advise.. but your main goal is to limit the calls police have to make to your property so you don't want to be listed as a nuisance property. but if the issues warrants it yes call the cops and if a neighboring unit is worried tell them to call the cops sometimes you have to have a record of police calls to verify the issue so you can write up infraction for eviction action..

At this same property, there is a house sitter that had a lot of police activity (domestic violence, weapons discharged, etc).

Now ~18 months later, it's been in service as an STR for about one year.  

You need to have a plan to service your debt if the rental property isnt working out.

I'm actively converting STRs to PadSplit.

Are you providing cable and high speed internet, security system, cleaning service etc?

I invest in Detroit for myself (12 doors) and am extremely active there outside my own stuff.Happy to connect and talk about my experience in that market.

Being a local company, providing quality housing and great service is very important to us. 

Your husband's business is an active one and perhaps more prone to a potential lawsuit.

I also discovered the (linked right there on the Chancery Court's website, duh) the TN Rules of Civil Procedure, and realized that the proofs of service can be submitted individually as received, so I actually could have gone ahead against the other 4 without the 5th defendant being served.