OMFG - that is not dear at all. It's cheaper than that duration of lessons from an ordinary guitarist. But the students had better be good, I mean really really good - keeping up with his guitar technique will be soooooo hard. You don't realise how good his guitar work is until you see what his hands are doing, and all with timing you could set your watch to if you want to (and at the same time impeccably singing melodies with intervals that differ from modern norms that most of us could not do with someone else doing the guitar work - and doing them in timings to which the guitar part is the perfect accompaniment - but where needed in a different timing).   There are only a few guitar gods who know (I think Martin coined the phrase) that "all English folk song is in the time signature of "one"", and can play it like that, or can play it to a dance tempo if wishing to.

I simply would not dare play in such a workshop. And it's not as if I'm that shy really.