As far as I know all of the programs out there basically just help you build a frame for yourself. You will of course learn how to use whatever tooling that specific shop has in the process but you don't get anything from the course other than a completed frame and some knowledge of the process used to build it.
I decided not to go that route and I used the money I could have spent on a course on tooling instead. I spent many many hours reading, watching videos and looking at process photos online. I started just over two years ago and have now built 5 frames and done 4 repairs. 3 of those frames are my personal bikes that I race road, cross and track on.
Even though I have a lot of the additional knowledge one would need to start a framebuilding business I'm not particularly interested. I mean I'd love to spend my time building my personal vision of how bikes should be but I'm not convinced enough people would buy them to keep me afloat.