Re: Penn Foster or similar gunsmith courses
I am starting out from scratch. Well, I have a pretty decent machining background, so I am ahead of the curve in that aspect. I have purchased a couple different manuals, have read anything I can get my hands on concerning gunsmithing, more specifically rifle work. I am to the point of putting tool to steel.
Like key said, I would put that money into manuals, videos, etc that you feel would help guide you. That course might get you to a point, but in the end its actually doing, not reading.
Practice, practice, practice. Plumb some of your guns, multiple times, rebarrel anything you can get your hands on. Learn how to file, measure, polish, coat, grind, mill, turn until you are completely confident and competent before you start charging money for service. The last thing you want to do is to figure out how to do something on a customers rifle (unless he is a understanding buddy).
I am sure some of the smiths will be along to give input as well. I'll be tagging to see what they say, as I am curious.