Turnkey due diligence

[Jay Zoo]

Hello, this is yet another newbie turnkey rant! 

After reading many posts on this forum,talking to several "recommended" turnkey providers, and researching the typical linear markets that turnkeys operate in, I am still not sure how to weigh these different criterias to make an informed decision. 

So about market due diligence... I am willing to put some effort and I have already invested hours into market research. I gathered the recommended criterias like job growth, population trends, housing prices, diversity in industry, and etc. So how do you interpret this data? 

And in a typical turnkey markets, like Memphis and Indianapolis, Is high saturation of these mega turnkeys a bad sign in the long term?? I also heard of these "hot" rentals for a several years now