I'm father of 2 twins sisters (11) and a boy of 5 years old.
My father have a degenerative disease (fatal but with slow progression), and my mother spends most of her time taking care of him.
I put all my energy with my kids and helping my parents.
As soon as I realized that I can loose my loved ones, I started making selective choices with my time.
In the past, I was course trainer of linux during weekends. It was very rewarding to teach students that "wanted to learn" and the money was good, too. I remember when a student ssh'ed to a station and executed "eject" in the remote machine - he literally jumped in happiness!
I also made some websites in my spare time but it wasn't so rewarding.