This is REALLY REALLY a small point but I'd much rather have the PM store extra paint for inevitable touch-up than try to color-match 12 months later. 

Touch ups will be easier and I won’t question down the road what the heck color I used like in the past.

Stick with one color that is neutral, easy to clean, and keep some on hand for touchups during turnovers.

The property manager and tenant are given touch up paint so the turnover touch up painting costs can be reduced.

I opened up a 4-hour slot on a Saturday and a 2-hour slot on a Monday evening (we had touch up paint and cleaning and other stuff still to do while we were there, so it wouldn't feel like a waste of time when we were in-between appts).

If you don't allow them to paint, you have a much better shot at just going over some touch up areas and maybe doing a few rooms only.The nice thing is that if you don't allow smoking, you can typically get away with repainting a room with the same color without having to cut anything in.Just roll it up to an inch or two from the ceiling and an inch or two from the trim and you won't be able to tell if you use the right paint (tan).  

Floors are done:I did the trim work for about a week and touch up paint where I had bumped the trim with my staining pad. 

Other issues (touch-up paint vs. repaint) depend on your business model.

What's your experience... do you typically touch up paint?  

Or just full rehab at the start and just touch ups just before resell?