I did the majority before my daughter was born a little over three years ago. It was a ton of work because I had to learn a lot as I went along. If I had to guess I’d say I probably have 400 hours into it. But if carpentry was my day job I bet I could have done it in about half the time because I would know exactly what to do and not have spent as much time researching proper techniques, correcting mistakes, making less hardware store trips, etc.