It sounds as though your lifestyle isn't exactly a perfect match for a dog (maybe a nice independent, fuss-free cat?) but it doesn't mean it's impossible. Instead of looking for a particular breed or trying to get a puppy.....
Check with rescue and foster groups!
Here's why: They could possibly have an older dog who sleeps most of the day away anyways, doesn't require much exercise and would be a good match for you. You never know! If you get your info to them and a dog perfect for you comes across they would probably let you know and you could be a part of saving a life.
