What is your secret sauce or what skills do you have in your toolbox that help you acquire these properties at discounts? 

The tomato and vegetable pricing, actually still has no inflation.

@Tanner Kier there’s no secret sauce to this problem.

Awesome sauce Evan!

OK, so I'm ruling out four of those dentists, the one way below market is probably sketchy, and whatever it is that attempts to justify $1200, I probably don't need it (if I did need that expensive special sauce, I'd already know, and btw this will be the dentist that says "all dentists charge the same," wouldn't it?)

I sold it one year later because the dues went up significantly, and I got sick and tired of the hassles - being harassed by the "plant nazi" for my potted tomato plants (and my place was gorgeous), just constant hassle.And I lived in it myself.  

Tabasco sauce ?

Do the people on the board care more about someone having tomato plants in a container on their balcony than fixing the roads in the complex? 

Fortunately, I still made a profit, but my HOA dues went up 33%, I had a plant nazi give me grief about tomato plants in planters in my yard, just on and frickin' on. 

There is no special magic sauce to what he is doing.