My 9 month old son has 45min sleep cycles during the day so that doesn't leave much time to code after washing and sterilising his bottles and grabbing a quick bite myself! He doesn't always sleep into the next cycle by himself so I have to be by his crib to pat him and thats where my new workstation is lol!

But honestly I think being a self employed developer is the best option if you want to really help out with the upbringing of your kids and avoid getting a nanny.