I've been reading an interesting and inspiring book called 'How to Survive Without a Salary' by Charles Long, a Canadian. I picked it up for one little section on Casual Income, but then couldn't put it down.
The main idea of the book is bucking the cultural system of earn more and spend more.
I liked in particular this section, which picked up my spirits just as I was considering giving up this little experiment in unpaid ministry and entrepreneurship.

"Is it merely weakness that leads some of us to leave careers that get too demanding? 'When the going gets tough, the tough get going,' and all that. Ambition is a fine and noble thing, and God forbid that anyone should abandon distant goals just because they're hard to reach. What is too often overlooked, however, is the simple idea that ambition and employment need not be synonymous. Ambition can exist outside the workplace.
"Some of the world's most noted overachievers have succeeded precisely because they abandoned careers to pursue other goals... and regarded money as a minor but necessary nuisance. If ambition and success were confined to regular jobs, Gauguin might never have painted and the Wright brothers would have stuck to fixing bicycles in Dayton.
"Someone, somehow, has tricked us into believing that security and self-worth come only from what we are paid to do. We become our jobs and we're worth only what we're paid. What rubbish! Esteem ought to come from everything we do and not just what we're paid to do."
~Long, Charles (1996). 'How to Live Without a Salary.' Toronto, Ontario: Warwick Publishing, Inc. Pages 88 and 89.