That's just not enough. We're not built for free time as a species. We think we are, but we aren't. I'm sure most people would scoff at this analysis. Well, don't be so sure.
Free time takes some getting used to, as do alternative measures of making a living.
If you think you can handle more free time, and less stress, then try cutting back. Stop working Saturdays. Watch where the money goes. Take a sack lunch. Look into a VS study circle.