Having taught a few people to build over the years i can say that it takes many times longer to teach then to build. So if a builder gets $500 for his time for building (and this is a number pulled out of thin air for the sake of discussion) said builder might need to get $2000-3000 for the time he'll spend teaching. The "builders" who have established their business model with teaching as a large aspect can charge less (with more students in each class). And of course this "course cost" doesn't yet include materials or shop overheads.

The only reason i taught those that i did was because they were friends and investing is those around you is worth more then money. Andy.