If you want to be hands-on, everyone talks about David Greene's book on here that is supposedly really good for that.

Be sure to clean window sills, inside the windows and the floors under windows and also exterior doors, Each inspector has their hot buttons.

@Jonathan Greene Are there certain types of "buyer premiums" to look for?

You could just put in regular machines and not give your tenants access...of course, they won't be thrilled the first time they run into you with a basket of clean cloths under your arm.

Suggest that their part will be to have the unit in "show-ready condition" (clean, uncluttered) and to accommodate showings. 

A good GC would have multiple trades working at same time and site should look pretty clean.

Replaced the windows, HVAC, thorough cleaning & paint What was the outcome?

Sounds like you logged in to the 3270 terminals (the "green screens") at the courthouse and couldn't find the case(s) you were looking for.

We put in new floors, paint, fixtures, and cleaned up landscaping.

If I was renting and the landlord said "The dryer repair person will be there at 1:00 to fix it" It would not be outside the realm of expectation on my part that "Cool, I'm working at that time they can do whatever they need to, I'll just make sure I clean my socks off the floor".