for example, you have the lehigh valley in PA just a couple hours away from you.i'll also say this. 

Highly recommend (I require) collecting first month's rent prior to handing over keys.

The sooner you start getting your hands dirty, the quicker that experience will come.

Then on the other hand I am worried that I may be leaving some money on the table if the value going to go up in that market.  

On the other hand, I’m hesitant to simply pay down more of a property, as we don’t need the immediate cash flow.Fortunately, both my wife’s job and mine are recession-proof, which allows us to be a bit more aggressive with our investments.I’d really appreciate advice from investors who have experience with frequent moves or military service.

A couple of things to note:1.

Of course there could be some other local businesses that might would want to use or share a couple of the offices that would possibly increase revenue. 

CO Tenant Screening Laws have changed a lot over the last couple years.

I’ve also used a HELOC to buy a couple houses.

Quote from @Rou Odab: Some of these things would come up on a home inspection, but since we are past that I would do a couple of things.