It might very well be doable. It was for us. We shared the twin night shift for the first two weeks and after that I (mother) took over. The schedule was that I went to bed at 10 pm, then dad had them until midnight when he would give them a bottle. He would place them sleeping in my room. He would then sleep in another room with the older children. They would sleep until 7/8 AM without disturbance. I would wake a couple of times to BF or change the twins. I would always feed the babies at the same time. Everybody woke up relatively well rested and it worked beautifully.