It's very difficult for buttons to live outside unless it's in a nice warm area. You'd have to bring them in during the winter and make sure it's very predator proof. Tone honest I wouldn't recommend putting buttons outside at all but it's possible if you provide them shelter, protection, etc.
They can live wherever you want to keep them as long you keep their temperature between 40 and 90 degrees F. I move mine in for the winter and put them out for the summer.