If you don't mind. Would you be willing to go a bit deeper into how you were able to afford that (flying every weekend/YC in general)?
I assume you had quite a bit of money saved in order to afford your typical living expense, flying to and from YC every weekend, and a place to stay in Mountain View.
If you did in fact save, were you doing that actively in the event that you got into YC or did you essentially just drain your savings once you got in?