Good job exploiting yourself sucker. No, but seriously keep in mind that your time is limited, especially when you got little kids at home.
While your clients may appreciate any extra work you do for them and it might even get you "loyal" clients, little timmy would also like to spend some time with you.
Totally agree about the kids thing. Being a parent should always take precedence over working(besides working extra to fund the basic needs of the household). Good point :)
This isn't exactly the most prevalent opinion, but a major part of how these things work is the induced mentality. The main question would be "are you working yourself to death, trying to meet unrealistic expectations set by the dominant societal mindset?"
If, instead, you're just tinkering and like doing what you're doing, that's a different story.