If I may be a hypocrite for a minute (i.e. I have done what you propose and remain in that situation), I would caution against dropping your regular income source in favour of going all out on a first project. Mitigating factors would be a) you are confident you can easily get back to your current level of work and income should things go south, and b) your budget will be fine if your game makes $0.
You seem to suggest a part time hybrid solution is possible, if that’s the case then that’s my vote!