$30/hour means if you work an 11 hour day, you make $330 in a day. For a lot of people, this is a good income. If someone is working 40 hour weeks, then their annual salary at $30 an hour is $60,000 a year. If you are putting in an 11 hour day, then that goes up to $82,500, assuming you work 5 days a week.
For some people this would be great. For others, working an 11 hour day is a deal breaker.
One thing you are doing that is smart - setting the boundaries you can live with. different people have different boundaries. I'm glad you respect yourself enough to set yours where they are good for you.