It depends on type of materials and finishes. 

Not only are your costs higher but so are your material costs for rehabs/renos (you may also need to give the unit a new look more often to match the expectations of the HGTV loving tenants and to keep you competitive in the marketplace) also people tend to overlook the fact that white collar tenants can be really needy.

$15.2k total including materials, labor, and engineering inspection.

I don't recall the exact cost because it was part of a scope of work that included $50k of work, but in terms of labor and material costs dedicated to this exact task it wasn't too much.

Can you recommend any introductory tutorial materials? 

My thinking is if it is that old the home will sell better with modern materials and features. 

Excellent resource material if you are determined to spend the time and effort doing it yourself. 

I've never made a youtube video before, but I want to start trying to get some material out...

This is the only material I used to study.

Can't you come up with any new material?