But there are cosmetic issues in the house, like small crack on a window, tiny stain on carpet, and so on.

I kind of wondered if something like that may have happened - where they wore away the coating by scrubbing a stain. 

The kitchen has grease stains on the ceiling, blinds, and the countertop looks ruined.

@Katrina Cebrian I’m not sure why you’d even consider this person unless you like patching holes punched in sheet rock, repairing doors ripped off their hinges and cleaning up blood stains in your carpet.

Stains on the carpets, holes in walls probably didn't exist when they moved in, if they did, they should not have moved in.

The landlord used cheap carpet that he could just completely replace for cheap if the last tenant left it stained.  

After removing the carpet and engineered wood we saw stains all over the subfloor that had to be treated with enzymes, then vinegar, then bleach.

The one thing I may pause at is the stains on the floor.

I have rust stains in my garage.

It would take me a day to cut the counter pieces and sink holes, a day to stain and poly and another day to install (pieces in place and get the sink and faucet placed)... the product held up well and still looks good, but you can’t have an under mount sink and it just turned into a time thing.