My primary hobby/passion is restoring antique (British) motorcycles. I have a small machine shop (lathe, milling machine, drill press, welders, etc) to fabricate pieces and parts as required. I perform all bicycle maintenance/improvement including wheelbuilding.
The significant requisite is to acquire/use the best high quality tools. Cheap/crappy tools will end up costing more in long run due to damaged/distorted parts and inabilty to complete the task satisfactorily.
Parts aquisition is becomming a challenge...even for relatively late model, ie 6500 series Ultegra, components.
You cannot pay someone enough to CARE as much you.