Going away for a week long residential course felt like a very long time to be away from my 3 year old. Can't imagine doing that every week. I feel bad about he

Going away for a week long residential course felt like a very long time to be away from my 3 year old. Can't imagine doing that every week. I feel bad about her being at nursery for 10 hours a day (8am to 6pm) whilst I'm at work; luckily that's only 3 days a week as my wife and I only work 4 days each.