My impression is that the monthly % should cover most administrative costs which should be fairly predictable and the additional costs would include repairs/maintenance, lease up fees and eviction costs.

Actually with the expenses they are claiming it is a lower cap.Now if I was buying an amazing asset with a long history 5 + years of performing and immaculate books then I can predict to a certain degree how it will keep performing in the future.

.,  much like  one of the previous commentators, you presented nothing to support your position on CNN regarding real estate predictions or the questions posed. 

I am sure many of you might have check out the blog posting from BP about Top 25 SFH Rental Markets predicted to have largest growth.https://www.biggerpockets.com/renewsblog/25-single-family-rental-markets-predicted-highest-growth-2017/?

If the property is well worth the enormous cost of the money, it may deserve consideration, however, you can never predict where will you be financially in one year.

What are your predictions?

This is not to brag ^^ ... but I like telling folks because we could have never predicted our growth.

While no one can predict the future, you have too much in front of you now in the type of tenant (as already mentioned) and location that will prove to be problematic.

My goal is help REIs avoid many of the predictable rookie traps that lead to bad experiences and financial disasters. 

It’s impossible to predict the next real estate crash; just like stock market, those who say they can, are 100% full of crap.