Really depends on your personal situation. 23K goes away pretty fast especially in non-funded ventures. But then again, doing something in parallel rarely takes off.

Ask yourself: - How much do I stand to gain (whats your share of equity) - Who will seed fund the venture (23K is not going to be enough to live and fund even your prelaunch activities) - How quickly will you make your first sale. Better yet can you book pre-sales. This leaves you with a much cleaner milestone/deadline. In that case you can take some unpaid leave instead of quitting and see if you can hit that milestone.