I am not sure the days off to hours per week ratio for a sane life..

I.e. I hear 12 days off and I shrug. I hear 18 hour workdays and never seeing your family and my jaw drops.

I think if I worked 20h weeks, 0 days off would be okay. You never get THAT burned out over a week that the weekend can't cure you.

But if I worked 80 hour weeks, I would need 30 days off per year to stay long term sane.