You may find that the tenant is looking for motivation to change these habits.

I'm single have no kids and I travel 2-3 weeks out of the month for my job.

tenant can argue it's a habitability issue.construction debris, dust, etc.if you reach an agreement in writing, then he accepts the living conditions.

I have a habit of beginning with the end in mind.

As for the 'agents are always late', I'm not ALWAYS late but own up to the occasional delay so I'm not certain why agents have that really REALLY BAD habit. 

The tenants that recently moved out did a lot of traveling, so there was great opportunity for them to bring back bed bugs and give me a headache.

I'm a local investor in the Harrisburg area as well and I will second that you should check out some of the local real estate clubs at www.meetup.comThere are a couple in the Harrisburg area as well as Camp Hill, York, Lancaster, and Lebanon depending on how far you're willing to travel and your schedule. 

It looked like it was built in the mid 1800's and only 1 unit was habitable.

Originally from Asheville and we would travel down frequently.

Some of the properties weren't even habitable due to hurricane damage while others were stabilized and performing, but needed upgrades.