I try and make part of my living(you call this a living?) by teaching guitar and other instruments. I charge $35 a lesson, but if you pay for 4 in advance I will knock $5 off the price of each one. There is no particular time limit, and I go will come to a students home.
I'm in Eugene, Oregon. It depends on where you live as to what the going rate is. Some people charge less. I hear that there is one well known folkie in the Bay Area who gets $90 a shot.

Mark Ross