If you can do it on the side, I strongly urge you to take that route. Quit only when you are already seeing traction at your startup and requires your attention. Even at that point, see if you can take a short break at your current workplace.
Take extreme measures only when situation demands it. Do not force yourself into extreme situations especially if you don't have a backup.
It is good to have confidence. But don't let that blindside you.
Why I don't want to do it on the side I answered in the comment below you, but I don't believe that's how great companies are built. And that's what I want to build.
On the side I've built, and have either launched or (in QuickRamen's case ready to launch):
Quickramen.com
Letterlasso.com
Traxi.co
Helped with
Coffitivity.com (200k users in 3 weeks)
Added to
cityswig.com relaunch (my old startup, relaunching this week)
None of which have the potential to be huge or great companies. I want to build something great.
I feel like I should be clear here: my lifestyle is extremely simple. With my savings, even $600 a month would cut it for close to 9 months, 6 months without ANY decrease in lifestyle. Upon needing a job, I could get a restaurant job and continue to support my lifestyle or get a job in my field within a month at most.
Take extreme measures only when situation demands it. Do not force yourself into extreme situations especially if you don't have a backup.
It is good to have confidence. But don't let that blindside you.