I went to a camera repair school.
JordanStarr: Interesting name, I'll talk about that latter. I went to National Camera Repair School in Denver, Co. back in 1976. I did a little repair work at a camera store and then went back home and started doing some at home. NatCam is no longer in business but their old manuals are available by the author (Larry Lyells I think is his name.) and Phil Zimmerman, as well as others. There was a course that you could take online and may still be available. I have some things to tell you to look into if you pursue this endevor. I suggest a BS in electronics. If not that, a good military training or some sort of minimum training in electronics. As was pointed out, when the Canon AE-1 came out, the whole picture changed. Before that cameras like the Nikkormats were the big cheese and they were expensive. Many of the 35mm cameras today either electronic or manual are not worth repairing. Now once you have the training, (and if you have never tried to put the diagram leaves back in place on a shutter, you have something to look forward to) then you will need to purchase test equipment. The last time I priced a shutter tester, it was something like $6000. You should also have a collimator for checking focus and other things are handy like a cleaning machine. Then you will need the manuals. Now they are usually on CD's so not as expensive as when I was doing it. It was not uncommon to get a manual for $50. Imagine buying five Nikon manuals and 5 Minolta manuals and you were talking some money. I would suggest limiting yourself to two or three cameras for that reason and others. You will notice in the magazines places advertise that they do Mamiya or Rollei repairs. Just like your car, you now take it to a GM dealer or a Toyota. The coming thing is going to be digital if you want to stay in business. At 26, you have to look at the next 30 years, and although there will be manual shutter cameras (film) if you are going to plan on eating, you will have to tackle electronic and digital cameras. The nice thing that you have going for you is the internet and such things as CD's or DVD's to teach you what you need to know and to help you through a problem. Many a time I had to spend hours trying to figure out something whereas now you can just email someone or buy a book on it. I got into repairing cameras at a bad time. So many things were changing that it was hard to keep up. When I started there was no such thing as auto focus lenses or stabilization. Even auto flashes were nearly unheard of. The biggest problem was electronics for me. Some of the top line Nikon's for example had 40 plus wires that might need to be unsoldered. Once you take down a camera for a good cleaning you have messed up all the settings for focus and such. There is a lot to disassembling a SLR and unless you can do it in an hour, you are not making a lot of money. Do try to be trained by one company such as Nikon or Pentax and then branch out from there. Good luck. Ric.
(P.S. About your name, I'm related to a David Starr Jordan, who was the president of Stanford U. in California and was a famous scientist.) Richard Jordan Trexell.