I'm not sure if this is an option for you but if you average out my hours over the year, i work part time. I'm a contractor, I work 6-8 months of the year full time, and the rest of the time i do what i like.

It does mean i have to be financially disciplined, which thankfully (after learning the hard way) does now come easy to me. It also allows me the flexibility to not be tied down to one location throughout the entire year, which working 2-3 days a week does.