I've found this thread to be very helpful regarding the housing/husbandry of your future snake.

http://ball-pythons.net/forums/showthread.php?t=55849

In my experience, which isn't much, Ball Pythons are significantly less active and require less attention than a dog (by a long shot). But they are pretty clever so you have to keep an eye on them, and they do have routine needs that should be met. But no where near as much as [most] dogs.

Someone with more knowledge will correct me if anything is misleading. hope that helps!