I don't know about some of these points...... ?? In the beginning, when one is getting his/her business off the ground, you want to work long hours to accommodate your customers' needs. You work and do whatever you can to keep your customers happy, which in turn, makes you happy. Once you reach a point of too many hours, generally you raise your prices ad if that still doesn't help, you hire someone to give you a break from 60 and 70 hours weeks to 40 or 50 hours. Working Saturdays was always something I thought necessary. Many people want signs who can't themselves get out of work during the same hours you wanna keep, so when they called, it was easy to say, yeah.... Saturdays from 8am to 1pm. I also got a lot done on Saturdays because the phone didn't ring as much and they're weren't as many interruptions.
Saturdays stopped for me about 25 years ago. I'll still work if it's a big money maker, but 99% of the time, I'm home working in the garden, around the property or just enjoying life.
Again, this is all coming from someone who owned their own business for quite some time. Employees, generally hang their hat at 5 o'clock Friday and don't think another ounce until Monday at 8:30am.