I am a buy and hold investor in NE Ohio concentrating in Stark county.  

Is there something I should concentrate on?

Having said that I'm concentrating on the positives of retirement....more time to learn and invest and do it right the next time, more time to catch up on projects at the home front, more family time for sure and of course much more play time.

Regardless of the military aspect, I suggest you investigate low income landlording and deciding if that is a direction you want to go, or concentrate on better neighborhoods.

It's been my experience that I would rather have sellers chasing me, rather than me chasing them.I know you have all heard it before, but concentrate your efforts online. 

Might have to consider exiting that market and concentrating somewhere that will work better with your needs. 

I told her that more then likely is not possible for our market and that we need to concentrate on which side of town we will invest in to get the best return. 

Unless you have a wife who either doesn't work or works p/t or a realtor or somehow else in real estate profession and can claim "real estate professional" status, you're out of luck.2) if you have a high paying job, then concentrate on continuing to make the money through it and invest passively.

I highly suggest sitting down and concentrating and writing down in a journal - some pat answers you can pull out of your hat.Until you get really good at it, this is your automatic response from now own:1) "I'll have to get back to you on that."  

just guessing but it sounds like normal C class activity throughout the US frankly.. older properties that need cap ex.. tough weather environment.. renters that are income challenged . etc etc.Contrary to others I would concentrate on paying one off at a time.. the best way to run C and D class is to have them paid off as soon as possible, you have a good job your young.. if you can get these paid off that would be a goal... or just sell them all and recalibrate into a better ( nicer asset class) that is not so maintenance heavy and better renter class).I also don't think most people after a few years really know how much or how little they make on their rentals..