Never forget, your music should either:

1) Give you pleasure and satisfaction, or;

2) Provide so much income that it's worth doing it even if it's unsatisfying.

If you haven't noticed, (2) above does not apply to 99.9999% of folk musicians. So (1) has to.

So if you work so hard at it that it stops being fun, you might as well say the hell with it.

IMNSHO

Peter.