Also worth mentioning my wife is an RN, making great money, in school pursuing a career as a Nurse Practitioner.

I think you should be able to find if you spend sometime inquiring a competent practitioner that has both ample real estate and multi state experience at many mid sized firms. 

Often they're more educators than practitioners.   

I’m an IRS EA/Tax Practitioner and also invest in Airbnb/Short-term rentals.

You're correct that purchasing properties, renting them out with a cash flow, and repeating the process by adding properties IS, by definition what most REI practitioners are doing.

My FT job is a nurse practitioner.

(Current physician tenants are your best source for finding new tenants, through their professional/personal connections.)Are you looking for solo practitioners, or small groups of 3 to 4 physicians?

@Mike CelliYes many solo practitioners own stand alone buildings.

I think you rented to a down on his luck solo practitioner who is basically on a "eat what you kill" income, like a real estate agent or used car salesman.  

My point has/is/and will be that this is such a grey area (as to whether or not 199A will be inclusive of rental real estate), and that each practitioner will have his/her interpretation of this because, ESPECIALLY now based off the proposed guidelines, the IRS is deferring to IRC162 to define a TB.