my male we got him when he was few weeks old, he was crate trained for first 6-8 months, in the same time we got our female she was already 6 months old and lived out side. she took more work but eventualy calmed down in the crate.
my job had me at work from 6am-4pm for fist 9 months, then deployment, where my wife took care of the dogs. she walked dogs in am, went to school in am. back to feed dog sand walk on lunch. work from 12-8 and then home for a second meal and walks. the dogs were crated while at school and work. went to dog park for 2-3 hours on weekends and her days off.
have not had any issues since ive gotten back in last year and half. we keep the dogs down stairs to roam as they please. no issues.