You can get into a B neighborhood in Pitt for like 90k on a fix and flip project. 

First, allow me to define small value-add Multi-family, I speak with a broad brush.. anything legally zoned duplex up to 50 units (I'm excluding Class A-B big MF) To set some context, most of the investors that reach out to me are not from Charlotte, or are not intimately familiar with the market here.

Where I have had luck and seen many of my clients making it work is on bigger 3/4 units in class A/B areas where ARV goes to 800k-1.1 million, as provides a big enough margin.

I rather have an A product in a B area than a B product in an A area.  

If rentals, Class A, B, C or D?

Also read and thoroughly understand AB 968.

Where I am (AB), we don't have as many closing costs as you seem to have in the US. 

I'd say my property is a B-C class; not knowing anything about Cleveland at first, I was fortunate to have a great realtor who guided me on getting to know the different areas better during my search (also during an actual visit out there).

Tax Questions:Are my assumptions in A, B and C and D above, correct?

At best they might be using national data, but that's not useful unless it separates Class A, B, C & D properties.