I am a solo founder with a 17 month old child, a second on the way and a full time job. While I don't know your idea, I can tell you that you can accomplish a t

I am a solo founder with a 17 month old child, a second on the way and a full time job. While I don't know your idea, I can tell you that you can accomplish a ton working nights and weekends and not jeopardize your primary income. I would suggest you don't quit your job until you know the project has traction and it's something people need and will pay for. I know it feels more real if you do it as a full time job but why risk your family's well being if you don't even know it will pan out...no matter how much you believe it will. There are some benefits to working nights and weekends: It forces you to make the most pragmatic choices. What is the absolute minimum required to get X done by Y schedule given I only have Z hours to work on it? I have probably slaughtered 75% of what I considered must have requirements for launch, simply by having insane time constraints...and I don't think my product is any worse for it. You also start thinking about what you need to work on and what you can farm out. I use elance all the time for stuff that doesn't provide competitive advantage. I probably also use far more third party services than I otherwise would. All of these where good decisions I probably wouldn't had made if I weren't equally time constrained.