Yes the investment from YC is not much, and that is exactly why I would like to use it for anything that makes my startup successful and nothing else. I think

Yes the investment from YC is not much, and that is exactly why I would like to use it for anything that makes my startup successful and nothing else. I think you're missing the point of YC if the only reason you're hesitant to bring on co-founders is to keep down living expenses deducted from initial YC funding. I'm sure PG might correct me if I'm wrong, but the philosophy of YC is that it's the founders themselves which determine a startup's chances of success. It's not saving a few thousand dollars on living expenses. You should be focused on getting your startup what it needs to be successful, and that's the right people first, money second, if at all. Of all the things YC provides the funding is probably the least significant thing influencing a startup's possible success.