@John Chapman, I am considering the following for improvements/repairsRoof, tile flooring, refinish/paint cabinets, replace restrooms vanity tops, replace kitchen countertop with similar laminate type, replace outdated bathtubs, and some plumbing repairs.

For example a newly remodeled property will have a low capEx cost where as an outdated property may require more CapEx.   

With the internet and market data available readily, I think we have an outdated system. 

(Not by using Google maps because they can easily be outdated pictures) There should be some.

For example, if the linoleum floor is outdated but not in pieces, would it be worth the investment to replace?

The second will be one that is near retail, but has a few items that need to be done, an outdated kitchen and a lot of wallpaper, and perhaps it's missing a second bathroom that would need to be added.  

BRRRR is great in theory but in today market that model is out dated just like the 2% rule..

I am assuming they units are vacant because they are out-dated, so you need to determine how much it will cost to update the units and how long that will take. 

If your property gets outdated and you want/need to remodel, be ready to pay through the nose.  

My neighbor is selling his home that is equivalent to mine in size however outdated inside and less upgraded then my house.