Mom got cats and this spoiled apartment

The fact is that my mother brings cats to the house. As a result, our well-equipped two-room apartment turned into a natural bomber. Everything is peeled, gnawed, bitten by animals.

A couple of years ago, we could not stand the husband and made repairs to our mother, today nothing has been left of this repair. Mom is no longer young, watch the animals trying, but can not really keep track of, we have six cats. At this age, it's hard for a person to keep track of cleanliness and without animals, but with animals it's just darkness. The apartment is already being killed at the capital repair level (cats pollute the crevices between their skirtings with their own urine, the ventilation system and everything else). From my mother stinks stink cat's urine (she has not felt this for a long time).

At the cost of incredible efforts we managed to persuade my mother to attach three cats, but she does not want to attach them, and I try, but no one wants to take ill-bred adult mongrel animals. I do not know what to do. Repairs every 2 years, we do not pull either physically, or even more, financially. Increasingly, it is thought to give cats to paid overexposure and not to take them out more. I do not know if it's right to do this, but at the same time, which of these positions is the way out.