And why didn't the insurance step in - for example, if my tenant slipped and fell and sued, the insurance company would be the first line of defense if it made it to court.

I self manage all my units, am currently working on a flip, and looking to build a storage unit here this year!

Read self help, books on improving your personal skills, how to effectively understand what people want and what you want from them, your ability to communicate with the people you want to be more connected with starts with your EQ, of course rich dad poor dad is a great start, but having a good foundation in communication, and practicing it daily will help you grow, you can learn real estate anywhere, people skills is an in the trenches skill, start with smiling at strangers and getting smile back its the simplest form of an exchange.

Do you plan to self manage the property or hire a property manager?

This year I'm looking at doing a self storage facility and am currently trying to find a software that can handle my regular rentals as well as the storage facility.

I househacked and self-managed it from purchase time to December of 2020.

My goal is only to invest for my self (1-2 properties/year).

The 1031 works just fine with each of these types.As far as sector goes both DSTs and NNNs will be available in all the types of investments you mentioned, medical, multifamily, retail, supply chain logistics, self storage etc. 

I self financed the deal.

I am interested in learning about self-storage properties.