I prefer a continual 50-60 hour work week, but I like, for moneys sake, an 84 hour week for relatively short spurts. Maybe 2 weeks of 7 days a week, 12 hour days, then a week of 50-60 hours, then another week or two of 7 x 12s.
A few rotations of these makes for some nice checks. (And one tired mountn man)
A few years back a grain company I worked for was awarded a huge wheat export contract. Hiring and training people would take too long so there were 16 of us who approached our manager about us working our regular job for 8 hours and then moving to another desk to process all the paperwork for another 8 hours. Had 16 hour days for a month but financially it was well worth it to both the employees and the company. Have always been amazed by the number of people who absolutely refuse to work any overtime at all for any reason.
Now own my own business and would love to get even minimum wage some months. But there are other trade-offs.