Also their plans seem to fit will with the aesthetic and mountain cabin feel I was going for. 

If its a A-B class neighborhood, I would place the most aesthetically pleasing of finishes there is because your clientele will expect that.

Of course, they are a mess to replace both financially and aesthetically, but have been worth it for me to do when the boiler died 

You were being punked for the brain damage of dealing with the building department after you made them mad.

With minor aesthetic updates, I know each unit could rent for $1000- $I200 per month (*without seeing the units yet*).

I estimate about 10k in repairs, mostly aesthetic.

I want buyers to get excited and take comfort knowing the home they are purchasing has not only been upgraded aesthetically but inside and out.

But as far as aesthetics go, I would absolutely remove that wall. 

This is absolutely NOT an endorsement or solicitation of this product, but I have been pretty impressed with Rustoleum products to date, and how they can "transform" certain aesthetic aspects of my rentals.https://www.rustoleum.com/en/product-catalog/consumer-brands/specialty/stainless-steel

The problem is the hardwoods look aesthetically bad, but the good news is the floors have never been refinished, and had been covered with carpet most of their lives so their potential for restoration down the road, for sale, is pretty good.This will be a low end rental so I really don’t want to sand and refinish the floor for renters with pets then have the same issues when they move out.