As far as books and audiobooks I would nudge towards books non real estate as much as real estate too.

I describe Class C as "nothing fancy, but it's clean, safe, everything works."  

One thing I heard you say, is that you don’t need to be an agent to access the MLS, but I’m not sure I heard exactly how it is that non agents can access it.

What are all of the non-interest rate and non-points costs? 

You have controllable and non-controllable costs and cumulative and non-cumulative CAM costs if any depending on what is written into each individual lease.

If using a lender this is a non issue.

Does that mean that lenders of a traditional loan on investment property in a Non Recourse state can not go after personal assets except for the collateral property in case of default? 

So my gut feeling just based on what you said would be to get it "freshened up" (6 panel doors, some nice paint, replace some carpets, remove clutter, heavy cleaning, clean ducts) and get as much as you can out of it.

Many c/d condo buildings have a high non-owner occupancy.

Most investors rely on hard money lenders to secure non-homestead/investment properties.