I worked in childcare. I know its not nearly the same, but you'll be amazed how well you manage to create a 'production line'! The ratio was 5 children aged 0-2yrs per caregiver. There were times where i would have 3 or 4 all being fed at once and it may seem daunting but you work out the kinks of how best to go about it. My suggestion would be not to wait until DH isnt there but to practice in advance. That way when the time comes where you are on your own, you already have some of the kinks worked out which makes it less frustrating for you and children.