I think it helps if you've done this once already. Ie death marches at bigco. The thing that everyone seems to have forgotten is that large part of the 80 hour

I think it helps if you've done this once already. Ie death marches at bigco. The thing that everyone seems to have forgotten is that large part of the 80 hours at a star up as a founder, is self driven. Ie you'll jump out of bed everyday excited to get to work. If you can make sure you don't get burnt out, I think it's sustainable at 40 hours a week. Michael Wolfe has some great answers on quora about how to run a startup and not get burnt out.