Border collie owner, and as stated, you need a lot of room and more animals than one cat. They are working dogs, and you must give them a job. Sitting around the house all day while someone is at work will lead to a messed up, destructive dog.
You may think it's fun to go play frisbee in the afternoons. But try for a couple of hours a day every day. And there is no saying "no". Smartest dog I've ever had, but requires a lot of effort on the owners part to keep them happy. She herds the other dogs 😀