So much so that it would be difficult to make even a dent in the need by opening thousands of homes.When done right, these are high cash flowing homes.

I highly recommend you travel to the market yourself and spend a couple days driving around, looking at various properties, if you are going to be buying anywhere.  

I have come across his youtube videos in the past and did not care for the advice.

During my investing career, I have found a great ability to manage all types of properties at a high level.

If you have a high income and can support 2 mortgages with your DTI, then providing a solid LOE for your circumstance may suffice. 

As Knoxville has seen high 6% appreciation in the last year, can you get a better ROI elsewhere?

Hardly ‘revenue grade’...

Ps I'm all about giving back, so I would be interested in helping out some high school kids for sure, or getting involved with mentoring somehow.

Any business can be profitable if done correctly.Look at your own video.

Anything over that could mean that the property is overstaffed, or it could mean that management is delivering a very high level of service such as in a luxury property that has a doorman and all sorts of staff that you don't typically see in garden style apartments.