The property is a small, recently renovated building with fresh paint and all the necessary tools and equipment for a dental practice.

We do long-term rentals and practice BRRRR on every deal.

You are absolutely correct - I have never done this exercise. 

Time and practice will still teach you as you do deals but it will help you understand what things costs for the size of the property 

Account ClosedAdding your property manager as "additional insured" is standard practice and beneficial for you.

The buyer completely takes over the original loan for all legal, tax and practical purposes.

Start by educating yourself with foundational books like The Millionaire Real Estate Investor and practicing deal analysis using tools like BiggerPockets calculators.

Quote from @Ashish Acharya: @Sanjai Dayal If your LLC owns the commercial building and leases space to your medical practice LLC, it’s essential to charge rent at fair market value (FMV) to avoid IRS scrutiny.

Heck, even within offices, the small 1-tenant office buildings suitable for a dental practice or law practice, those are in a very different world. 

E&O insurance isn’t mandated but is a standard practice in the industry to protect against mistakes or oversights.