I think a GSD would be great for you as long as you stay committed to your plans of regular walks and training. With a break in between the dog would be okay in a crate for that long a few days of the week as long as you keep up vigorous exercise and can get him or her out for a break in the middle like you said you could arrange.
And I think getting the dog from a rescue would also be a great idea, they usually advertise child/dog/cat friendliness and you could save a life!
And I think getting the dog from a rescue would also be a great idea, they usually advertise child/dog/cat friendliness and you could save a life!