I would say there could be a 10% swing either way from the Zestimate. 

Is it better to be great at one thing/aspect of investing, or to be a jack of all trades and master of none?

It then becomes a trade off of profit-for-tenant.  

I've been an Estimator and Assistant PM for a GC, performed take off for a large government construction management firm, conducted design reviews on behalf of the government, and I am an Architectural & Civil Drafter by trade.

STEM fields, medical, dental, law, refinery work (process operating, instrumentation, NDE and etc), trade skills (plumbing, electrical, etc..)

I have had risk based pricing on policies by area which could swing the rate by $500 depending on the zip code.  

Which is something I will have to dig out of a bit.Because of my path from office building to a pile of apartments, I have never flipped a house, never wholesale-d, never bought a duplex to then trade up to a 4-plex, etc.I still have a business in Los Angeles, that I manage and support from the East Coast where I now primarily live.

Seeing the process through and having knowledge of the various trades will give you appreciation for the people doing this work day in and out, as well as provide you with the ability to interact with contractors moving forward from that prospective.

If you hear the Trade War got 10 more years to go you know people are not patient it will trigger one even after another.  

Even if you strip out all the soft benefits, it's obvious that if you can trade something ( like your time), for something of much greater value (community goodwill, great PR, marketing photos, etc.) its a beneficial transaction!