Consider that the walls that you see as stained will have to be removed.

Like ripped linoleum floors or water stains on ceiling from previous tenants flooding.

My concern is that granite can stain and scratch if a tenant does not care for it well.  

Amazing how tenants can ruin, stain and destroy carpet in a room where they primarily sleep, but they do.LVP is waterproof, durable and inexpensive.

When my son was stained there it was a hell of a time when it came to him looking for off base housing that would work.

I sand, stain and urethane all the wood. 

It actually gave me a headache to use until it dried but it did get rid of all the odor and stains.

@Pete PerezIt's an espresso stained wide-plank engineered hardwood.  

Bifen IT provides excellent control of over 75 insect pests, leaves a long-lasting residual for up to 3 months indoors and one moth outdoors, is odorless, non-staining, dries clear and is safe around children and pets when used as directed.

But if you have some stain in the game go hit a sheriff sale and network with the guys there.