Cats are great creatures that are independant and take care of themselves. Cats don't need to be walked or ever let outside. Some people have outdoor cats that simply let them out in the day when they goto work. Most of the time that's okay, the cat just explores the neighborhood and comes but but rarely they don't come back. Some people never let their cats out in their lifetimes.
The problem with one cat at home, especially a young kitten is that it probably needs some company. Get two kittens and it'll be fine. Solitary cats that are indoor versus outdoor cats might develop some destructive behaviors if you are going to be gone all day.
