I would love to do this. I'm on the no debt, small house end of things. However, most employers in US (at least in my experience in the midwest) are still in the factory mindset. Meaning they want you in your seat by start time and there until end time. Working from home or working less hours is still looked on with suspicion (but the work from home situation is starting to improve).

I just don't think many employers are enlightened enough to allow a 30 hour week for knowledge workers (in the US and at this point in time).

Totally agree with your lifestyle though. I would trade big house/car for more free time any day.