Make an informed decision if you think people are properly trained?

If there are lease violations, mention them-you not having a key to access the unit WITH proper notice or in case of emergency is one of them.I'd also tell the tenant that they are clearly not happy there, so finding a new place is in their best interest as well and as they have several months, they should have lots of options.

One thing I’d stress is the significant difference between Detroit proper and the surrounding metro areas.

If I have some cash do you recommend clearing the loan or invest instead for next property with proper planning ? 

Like Matthew said just properly screen tenants.

Quote from @Matthew Irish-Jones: Quote from @Mark Cruse: Yes, there will be more expenses above what's mentioned here but if this is done properly it can be kept to a minimum.

A lot of the popular areas in Charleston proper that are not licensed under the old laws now require the owner to live on the premises to obtain an STR license.

Still up to me to properly utilize it and get the deals contracted.

Crossing the lines may not provide proper liability protection.Personally, I just kept my SF rentals in my name and got excellent insurance coverage, $500K per property plus a $2M umbrella.

Have to look at these things properly.