There's nothing wrong with graduating and working for a year (or two, or five) to save up capital. If you pick a good employer - like another startup - you'll earn much more than money. You'll have someone who's just as accomplished as PG teach you, except they'll pay you for the privilege instead of you giving them equity. You'll face all the same pitfalls as the yCombinator founders, and learn nearly as much. You'll learn all the little tricks and skills that everyone in industry knows but they never bother to teach in university.