Often you will work a lot more than other people, but you can take a day off whenever you need it. I work a lot, often in the evening while my family sits together reading or looking at the pads and phones - my wife also has her own business so she is also often at her computer. But the flexibility makes up for it. I always put the family first (I am the Trump of family-life) and that is really possible when you are your own master.

Good luck with the enterprise!