For me running the room (not teaching) 10-noon practice and 1-8 teaching works well from the students’ perspective: for practice time, breakthrough time, working on the test with others, and having breathing room for the entire transformative experience.
Then there is learning, demo, and exercise time for certification during mandatory classroom hours.
What I’ve seen, when you give them required time and optional time for practice you give the student the ability to choose how much they want to get from the class….you’ve left them an opening for 10 – 8pm and they choose to get every dime of value out of the experience, to utilize every moment of time to build their competencies and confidence, for their lives’ breakthroughs. This can be a very meaningful experience for the student and it leaves a deep impression, they leave saying “I paid $4000 for Rebecca’s class and I got $12,000 worth of breakthroughs.”
Plus you need to know how much energy you need to teach and what are the best times for you. Possibly if you taught 9am – 5pm you’d have practice time 6pm-9pm lightly supervised, meaning you pop in and out to check that they’re ok but technically you’re done for the day.
I see too much happen during practice time and out-of-training-hours time that stacks the value of their experience and the likelihood of them rolling over into EVERYTHING you teach, to not encourage you to look at extending your hours just a bit to give the students time to ‘hang out’ in your transformation bubble