Insurance companies often try to mitigate risks, I worked in one and often they have to policies, like getting re-insurance, if risks got too concentrated.

Myself I would recommend one market owning in multiple markets can be expensive just in travel etc.. better in my mind to concentrate in one area that you can get a direct flight to..  

We were going to fix it but every time we bought a more expensive property we concentrated on that so this one kept getting put on the back burner.

Their wealth is likely highly concentrated in a single asset that is levered many multiples of their annual income.

The concentration of the moisture damage andstaining would indicate a leak under the vanity.ApartmentConditions37 The kitchen faucet is loose, moisture damage at the backsplashbehind the sink, repairs needed.ApartmentConditions39 The bathroom floor is soft and spongy and lifting.

NYU, Columbia, MIT) and many others offer Real Estate major, minors and/or concentrations at the bachelor's level and/or within MBA programs. 

Where i go, Texas Tech University has a Finance major with a real estate concentration, so check schools near you and see if they offer something similar.

Third, it concentrates your risk in a fewer number of properties. 

Those of us who have had to manage people and projects happening remotely can tell you that there is a lot lost without regular interaction - I would say daily but I'm not a Luudite and I can see how a day or maybe even 2 remotely can help focus some jobs, but I will tell you that when everyone is working remote they only concentrate on their silos as if interaction with the rest of the staff is unimportant and as if Zoom can completely replace face to face contact.

I'm slowly trying to change my thinking and concentrate more on cash flow than equity since the cash flow is more important currently however, it's proving difficult.