I am in the camp that anyone can be found rather easily but it's a choice of your comfort level and what your desired outcome is.  

Your understanding of the capital gains calculation appears mostly correct, but a few details could affect the final outcome.

So before you get ready to attempt to rip your Landlord a new one, first go take it up with the local taxing authority, then go have it out with the insurance industry, then gripe to the neighborhood HOA (if applicable), then maybe settle your disputes with Home Depot/Lowes and any and all trade contractors.

Long term success means having a team of CPAs, Attorneys, Title Companies, GCs, trades, roofers, cleaners, lenders, and so many others on your team as an investor.Good luck. 

What was the outcome?

when lehigh was put in they punched in roads to 250,000 lots.. one can google earth it today and see blocks of lots with like 2 or 5 homes per 50 lots.. lots trade there when its good times for 20 to 25k and bad times 2 to 10k  like a ping pong ball.. the GFC took down many land plays even out west..

I’m not at a place where I can altruistically give my time without trading it for income.

What was the outcome?

I should have asked what didn't go according to plan and how they handled it, and what the ultimate outcome was since the brief summary of that deal just says they sold at a profit.4.

Keep your Trade job.