I'll throw my $.02 in on the Dayton market. I'm not originally from OH but have been here for 17 years now and only stay bc of the RE. Like @Andrew Weiner said, it's more about strategy and plan than market. I've had cheap houses in lower class areas and done very well and higher class assets that I got crushed on and visa versa. RE investing is everchanging based on local market conditions and the goals of the individual investor. Myself personally don't invest now in the same neighborhoods and asset class as I did 3 years ago. I'm further along the path now and have more knowledge, bigger goals, and resources than I did before. That doesn't mean my previous investments were bad it just means they are different.
That being said, Dayton in particular for me, offers many opportunities. Some of the benefits are affordability for the new investor who wants great cashflow to get out of the rat race, is small enough to not be on the national radar per say, which lessons competition (where I started), and is still big enough to scale (where I am now). I could not have done this in bigger markets because I wouldn't have been able to afford to get started. We do have many areas that are appreciating nicely so as your strategy and financial situation changes we have the ability locally to adapt and still be much more affordable than the big cities.
I hear all the time about our population and job growth being flat - that's true but there's a reason. Traditionally we have been a very blue collar city and as those jobs decrease and that generation of worker dies off we are seeing tremendous growth in the Tech industry which is bringing in more high paying jobs. When looking at the numbers from a distance you think nothing is happening but I believe that it's overall improving. As more and more NEW jobs and younger workers come in I forecast that in the near future you will start to see what many others already know.... ACTUALLY I HOPE MANY OTHERS NEVER SEE IT - MORE FOR ME LOL!