I survived 20 years without a day job, thanks to a very low material appetite, no children, a cheap-date wife, and no mortgage. I worked my butt off, "living my passion," and survived. I would do it all again, if I did it all the same way again. For anyone with normal responsibilities, I can't advise it. And too, there's always the risk of losing your passion when you turn it into a job. I'd say, get your product where you want it, start selling, and only when you can't keep up with the demand, give up that day job. But then, "Nothing ventured, nothing gained." But then and then, "Nothing ventured, nothing lost." Interesting times for all of us. Best luck. d