The final straw was just last week when tenant randomly attacked my competency in my professional career.

Similarly, if you are you a medical professional with strong connections at the local hospital, then target properties (and their owners) that would attract medical travelers.

I invested as a sophisticated investor, although I have no professional accreditations.

You can purchase them through a local dealer that has a good track record in the community.At this time our cleaners take care of the hot tub, but I will say if you have a certified hot tub company that can come weekly, I would definitely go that route!

Unless you use a local professional familiar with the market, who you trust, best way to know a good deal is to study the market.

I'm Chris, cybersecurity professional, and getting into wholesaling in Austin, TX and Northern California (Sacramento, SF/Bay area), all areas I know intimately. 

Many of the section 8 tenants I've had give me little to zero problems and take care of the place as though it's their own.

Can this person now be "a real estate" professional? 

You can learn by watching a professional manage the property.

Did you work with any real estate professionals (agents, lenders, etc.) that you'd recommend to others?