I started/trained/re-trained/finished a bunch of horses for my aunt. Anytime that I ever got a new horse, it was always a project. I also had a job for awhile that I tuned up a bunch of (mostly) barrel horses. All of them were either blown up on the pattern or had issues, lol. At the same job I halter-broke a couple of foals, too.
I only ever had my aunt and magazines/books/dvds/etc. to help guide me. Most of the training was through trial and error with my aunt's 9 year old mare, though. I did, however, get many complements on her, and always had people wanting to buy her. (NOT for her looks, either.
) My aunt sent her to barrel training a couple of months ago, and the trainer even wanted to buy her. He said that she was the most responsive/light horse he's ever ridden.
(It made me smile, lol.)