We've vaguely toyed with the idea, but at the moment we don't have time to do it properly (and I wouldn't want to do it any other way!).
I work full time (admittedly that's from home, so is flexible), and Bryan's busy full time renovating the house, renovating the barn and attempting to get everything vaguely sorted so that he can build his kiln and start making pottery for a living.
Maybe one day... And in the meantime, I just snaffle wool from whoever/wherever, and let someone else do the looking after sheep bit!