For instance, it is easy to have competitive bids for a roof, parking lot resurfacing, or HVAC system completed from a distance. 

Parking lot would need to be replaced or resurfaced sooner than later.

Replaced flooring, repainted the entire house, installed new trim, new doors, and cleaned like a maniac.I plan on resurfacing bathtubs and bathroom tile, fix garage doors, improve landscaping, and get a new backsplash/countertop for kitchen throughout the year before I house hack another home.All the comparable in the area are selling for 40k+ over our purchase price, I will consider refinancing whenever the FED cuts rates.What was the outcome?

Foundation fixed ( HOA Responsibility) Upper Windows cleaned, tub resurfaced, rooms repainted, a hole in a window screen.

I have heard the rustoleum shower resurface products are great!

You really have 2 things to consider the Fantasy of it--letting you close easier, (the potential renter believes they will use this item)and the reality of it no one using the pool except one apartment, yet pool overhead is expensive, deprecation on equipment, taxes, chemicals, upgrades to equipment, resurfacing, emptying trash, stolen deck chairs, etc...Same with a workout center, treadmills and big balls, and mats or treadmills plus workout machines, and when the TV's get stolen, etc..or nothing...What do potential renters for your specific place....think they want, and really do want....and then there is the cost....If you have dogs a dog walk is a good thing as the dog waste should be less all over the lawn.Just my 2 cents..

New kitchen, bathrooms, laundry, paint, trims, floor resurface, land scape.

Attend the city meetings and get them to do the following:Have the city bury all of the overhead wiring (to do it's part to revitalize the area).Have the city jack hammer all of the quilt work patches and end of service life concrete walks and replace them with new to code modern concrete walks, as well as driveway aprons (to do it's part to revitalize the area).Have the city put in modern curb and gutter, and resurface all of the roads in the neighborhood in new dark black asphalt with nice new white painted lines. 

However, I like to both "tenant proof" my rental properties and make them highly desirable, thus I still go with granite counters and resurface cabinets, stainless steel appliances, etc...

While expensive, consider resurfacing the driveway.