Chamber's videos are good, also American pioneer has good ones as well, and they can be rented. While they ae good, I would get Peter Alexander's The gunsmith of Grenville County, and Dixon's book on building. In my opinion they're mandatory reading before starting a first build. Dunlap's kit, like most others is just a collection of parts, in a rough style, that requires a lot of research, collecting of photo's, reading, and viewing of video, as well as joining a good site, like maybe this one
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That said have your friend dive in, and have a try at it.
Bill