One caveat is that I haven't gone through YC, however I am running my own startup right now in Los Altos/Palo Alto. Our next biggest expenses after salaries ar

One caveat is that I haven't gone through YC, however I am running my own startup right now in Los Altos/Palo Alto. Our next biggest expenses after salaries are legal bills and IT stuff. I believe YC really helps keeping the legal bills down (we're not so lucky), and many cloud services companies will offer you free cloud servers (including my own; do you need any instances?). Oh, also, office space costs an arm and a leg here, but presumably you can just work out of someone's house in the true start-up spirit. Other than that there's not much to worry about at first unless you need a foosball table. You're not going to have much time to play it though.