Anecdotal data point: my father was an entrepreneur for 100% of my childhood. It was rare for him to miss dinner with us, and he attended easily more than 60% of our extracurricular events. He'd often work from home late after we went to sleep, sometimes sleeping next to the phone to take customer support calls 12-5am. He had freedom to spend time with family and worked sufficient hours to achieve successful outcomes for his businesses. I think this form of scheduling is effective. Another anecdote: apparently Sheryl Sandberg also eats dinner with her family every day but works from home late at night and early in the morning.