After skimming through a large portion of George Daniel's book "Watchmaking", if anything, I very much appreciate how complicated making a mechanical watch is, and even more so, how easy it is to get things wrong. From what I saw, you have to have a lot of tooks to make your own mechanical watch, and it would not be something I would want to do without someone skilled in the craft.

That is a long way of saying, I am confused on how making a mechanical watch is a "hobby"?