Depends on your expenses. How long do you anticipate that amount would last? And, would you be totally doomed if after X months, your startup isn't making any m

Depends on your expenses. How long do you anticipate that amount would last? And, would you be totally doomed if after X months, your startup isn't making any money and you run out of savings? I think $18k is plenty fine, (but that's just me). I'm planning to do a similar thing and my savings are less than that.