That leads me to a question then, since RE management, sales, purchasing, leasing is a  profession, it requires a broader understanding in the industry than a single niche, that makes me ask who might be giving professional training, who are these professors of wisdom that advance the broad spectrum of education required in a profession?

I'm planning to do a self build so I have done extensive research on the associated costs and $200 per I believe is doable but most likely on the low end of the spectrum for a contractor built home in this area. 

Not just that yield curve inverted, look at the broad spectrum of bond maturities and see what message is saying to you. 

I view it as a spectrum, with most investments falling more toward one side or the other.Maybe, more toward the point, is the amount of time each investment requires, or the amount of decision making.

@Alex SkegOn the spectrum, NNN leased properties are considered less management intensive but as @Zach Alms pointed out you still need to make sure you're meeting the lease obligations. 

Tenants teach us.With shots fired and weapons brandished, you definitely got one end of the spectrum (the bad end).

A couple two cents here...There is a broad spectrum of risk levels in real estate investing.

Whilst all credit cards and even most residential & commercial landlord companies (Blackstone, Spectrum, LeFrak, GE, ING, etc) report rent payments (or lack/lateness) each month to major credit bureaus, virtually no landlords do this in my experience, despite likewise laxing laws enforcing default; for example in NY it is now illegal to refuse to rent to an applicant just because everywhere they've ever lived, they've always ended up exiting via Eviction!

Perspective-  Where are you individually on the growth spectrum?  

We lay on the "when to raise rent" spectrum somewhere between @Dawn Anastasi and @Rick Baggenstoss We typically raise rent between tenants.