Doubling your runway with part-time work only helps if it doesn't reduce your velocity by two or more, which it carries a high risk of doing.
That being the case, you're better off with the shorter runway in almost every respect (salary, time to market, quicker failure if it's going to tank anyway, less stress of juggling two jobs).
That being the case, you're better off with the shorter runway in almost every respect (salary, time to market, quicker failure if it's going to tank anyway, less stress of juggling two jobs).