If I were you, I wouldn't just let it get swept under the rug.

I never had a cat but I was told that if they are not properly trained and they urinate on rugs or hardwood that I will never be able to get the smell out.

It would really suck if the tenant didn't want to pay a plumber $25 to come over and replace a worn rubber washer on the kitchen sink drain pipe and that slow leak went down the walls into the basement under the rug out of sight and then your next tenant has an asthma attack because there is 100 sq ft of mold behind the walls.

Cats have urines issues that cannot be taken out or rugs. 

Hey I have a home that I'm going to have to change all the rugs and floors.

All was well until 10 days ago and can't believe they pulled the rug under my feet like that.

Other techniques smokers use to cover up their smoking: incense, air fresheners, and area rugs placed strategically on top of of the wall-to-wall carpeting.

Provide or require area rugs.

The furnished units would come with the following  a sectional couch, beds, pictures on the wall, shower curtain, rugs, dishes , pots and pans, dining room set.. etc.. 

They probably don't have it, though, so they'll try and bully you into paying for their hotel.We had a tenant have to move out one day because of a sewer backup that flooded her apartment rug partly into a room from the bathroom.