Yup what Taf says is right. We had a hell of a time finding a rental with our dogs but cats would have been no problem
you'll defo have to do the professional cleaning thing when you leave. We had to do it when we moved out of our first rental with our dogs, 4 bedroom house quite large $120 not bad eh? Defo worth it to have a roof over your head!!
As for carriers - not sure about cats but we used Ladyhaye for our dogs, vair competitive, vair professional and they gave us a full schedule of everything that needed to be done when. We just handed it to our vet and they did the rest