It's still functional, but the claw marks are deep and right at the recessed panel edges so sanding - patching - repainting is not going to work. 

Some landlords will bulk at replacing a window pane just because of a tiny crack in the corner or repainting a peeling window sill.  

Not just about the cabinets, when I moved in the paint was something like 9 days old, he wanted the place repainted and would accept the unit with paint not being more than 9 days old!!!

The entire place had to be re-painted, and I had to wash every wall and ceiling to even get the paint to stick.That being said, I am a smoker, I haven't smoked indoors in 10 years.

I prefer flat because it's easier to apply. 99 times out of 100 you're going to have/want to repaint a unit when someone moves out anyways.

A hot water heater one year, a HVAC unit one year, repainting parking lot one year, that sort of thing. 

Lets see if the checks keep coming but in the meantime this is found money and he has paid just under a third of the bill for completely repainting the unit.

Costs to clean and repaint, etc., in-between guests?

Maybe a different color in the bathroom if you will use a higher gloss paint.You want to minimize how much paint you have around, make it easy to repaint as needed, and spend less time switching colors.  

Replacing carpet or installing laminate and repainting a house is relatively cheap and can make the world of difference for some ugly houses and increase the amount of rent you can get.