Am I being paid enough at my babysitting job?

I have been babysitting for a family since I was a freshman in high school. I am now a senior in college. The child I work with is autistic and is a teenager now. When I began working for the family, I made $10 an hour. I am still making $10 an hour. The family is very very very well off and I feel as if I am being ripped off. I drive home from college about 20 miles away just to babysit for this family once a week. I know I could easily make more doing the same thing closer to my school and not have to spend as nearly as much on gas. Should I stick with this family until I graduate or should I move on?

Also, I watched the family's dog while they were away on the agreement that they would pay me what they would pay a kennel. When they got back, they said their kennel is only $30 a day (for a large breed dog). I feel as if they don't care to keep me working for them anymore.