Out of that $1,200, you could factor in loan buy down and tax benefits in addition to potential appreciation. 

What should we do: wife and I are potentially taking an international rotation to Europe.

In my rental agreement (lawyer reviewed and approved) it specifically says no smoking or vaping within 20ft of the building and all butts must be left in a coffee can with sand in the bottom and one is already provided in the "smoking area".Explanations are given for allergies, health, and second hand smoke etc. etc.I've not had any issues yet.

I'm soon to be leasing the PA farmland to a solar company on a long-term lease (more yearly than my W2 job, and 3% escalator, compounding).With such an advantageous situation in PA, I want to be able to maximize my potential.

I also make sure the potential tenant sends me references from their previous landlords and I end up calling them.

It definitely has potential, but I agree with what @Dan Heuschele said.

Would very much be interested in also seeing potential opportunities in Ohio!

I think the potential is there!

If you know where to buy, Philly is a good potential house hack market.

For that range you should not be having problems as you should be in B grade other than maintenance for capex that is missed but that is only a year or 2 and not vacancy.  .75% in Baltimore should be A grade with lesser vacancy and only potential initial maintenance.