In addition to my regular job, which I quite like, I work very part time for a special education consultant. Essentially, affluent families hire her to observe their children, review records, conduct testing, and help guide them through the process of getting the very best services and supports in place for the kids.
I'd like her job, except that rather than serving affluent children I'd like to have some kind of grant that would allow me to do the same work free of charge, advocating for kids in our inner city schools. She seems to make a small fortune, and I've sometimes wondered if I could establish a similar practice and then set aside 1/4 to 1/2 of my hours for working for families pro bono -- I think I could still do quite well for myself on 1/2 to 3/4 of what she's likely making.