When I was a kid, I wanted to spend more time with my dad, but he was always at work, and he was so tired in the evenings that it was difficult to engage with him.
The solution happened naturally as I grew up a bit. I would hop on my bike and go down and see him at his machine shop after school or in the middle of the day in the summer. Yes, he was busy, it's not like we were playing catch in the office, but the opportunity was there for me to tag-along and watch what he did.
I was extremely proud of him. He was the boss at his own company. I don't know what it would be like to have a dad that worked for other people, but I doubt I would have been as proud.
My mom started her own retail business too. I often would go and spend time with her during the day while she worked. There were plenty of slow times to have a chat about this or that.
In my own life, I don't yet have the privilege of working for myself, but I want to get to this point both for myself and for my kids, so not only will they have a guaranteed summer job :), but also so they can understand the value of independence.