I currently work 9-6 with a solid hour commute on each end of the day. So I am out from 7:45 a.m. to 7:15 pm every day.
I teach once a week, so that is one evening I get home pretty late, and take a class for myself one other weeknight and a Saturday morning.
It's pretty rough. My weekends are dedicated to being at home after that Sat. morning class.
Some changes are on the way. I change departments at work Nov. 29, and can then work flex hours, say, 7 to 4 or 8 to 5, allowing me to get home earlier on my off nights. I will also be working from home one day a week, freeing up more time. I plan to add a second class to my own dojo should things work out.
What's behind it all? If you are married, a spouse who understands your need to do what you do. If single, determination.