@Jody Schnurrenberger - interesting list and idea/topic to discuss.
As an FYI - I only have/work on row homes in south philly
For rentals, I absolutely do (every time): 2,4,6,7,8,12,18,22,23,24,25,26 --> anything preventative to ensure I don't get a phonecall later for a repair.. I do it up front. Water heater only has another 1-3 years life expectancy left.. I replace it. Same with roof. I never do a 'quick patch' of a major item (e.g. water heater, roof, appliance) in order to avoid a costly repair or replacement down the road. Being proactive definitely helps. With regards to labeling the house with numbers, providing fire extinguishers, etc .. some stuff is for code, the rest I do not only for tenants safety, but in the event of a real emergency, rescue/police can easily find the home (exterior lighting always on at night).
Exterior lighting - I use motion sensors in the back. In the front, I use LED fixtures (some on HD website are $40!) which have auto on/off for nighttime.. thus they just are hardwired on with electric and the built in photovoltaic (sp?) sensor auto turns on and off the light. Excellent feature!
PERKS/Added things I also do for all rentals/flips --> closet organizers (white melamine kits from walmart or HD). HVAC is either fully serviced, or if I have gas forced heat only and it needs replacement, I upgrade to central AC+gas heat HVAC system. Usually you can use the same ductwork and just upgrade the main unit. It's a little pricey, but with that brings a higher rent, plus I don't have to do it again down the road if I do a full upgrade
Also agree with changing all lights to LED (only use CFL now if LED is unavailable). I also change out all the door hardware to brushed nickel. All my rentals have been a higher end/modern look, which you can do on a budget if you shop for some items on Ebay, Craigslist, etc. Find the deals.. it adds up in savings in the end and the products still look as good as the pricey big-box store items.