Charge the pervious tenant for damages.If you need to paint, use something with a stain blocker to block in any remaining smells. 

The floor looks pretty bad with stains.

If the room/house already needed repainting - and you would want to know how old the paint was, because it is a question that could come up as well as claims by the tenant that the stains/odors were there before they moved in - I would just suck it up and repaint and let them be on their way.

Would I want to make sure that I had a some mixed patterns in there (or just straight black) that could mask whatever a tenant might accidentally do that results in a stain? 

And whether you continue to use that old cabinet base or replace the entire cabinet base, you can see that there was lots of water staining in the bottom of that cabinet.

Better to buy one with stain resistant and easy to clean upholstery.

Then I stained it grey, which looked blue, so I went over it again with a dark brown stain and it came out pretty cool.

Cost may be higher, but you don't have to paint/stain them, so maintenance costs are a lot lower.

They drop A lot of berries that make dark black/red stains on everything!! 

I have had the same laminate in rentals for 8+ years now and it still looks great (and it was the cheap stuff).Here is what I do....If there is clean concrete sub-floor (no adhesive) then I have the concrete stained and sealed (looks amazing and its very durable).The there is concrete sub-floor that cannot be stained then I lay tile.