Ask HN: Balancing a full time job while working on a start-up.

I want to develop a software application but given my full time job and kids I am unable to find any time to work on it. It feels like I am in a deadlock situation where I so badly want to work on the project but by the time I finally reach home and tuck my two little boys into bed I am dead tired and unable to work. My situation is so hopeless that the other day I was searching on Google on how to work while sleeping.

I have successfully created other software applications before but every-time it has been a struggle to the extent that I would only sleep for 2-3 hours a day. Now that I have a new born it has become almost impossible to take out any time whatsoever. So what do I do. Leave my job? That does not sound reasonable as I have a family of four to support. I guess being a successful entrepreneur is not in my destiny given my existing circumstances and I should stop taking stress about not being able to work on my start-up.