I'm not a commercial tree care professional, but I am trying to be more adept at caring for trees than your average "Guy with a chainsaw". I will never do any sort of tree service professionally as I work in aviation and am more than happy with my career. I just want to expand my knowledge and get better at tree management. I looked at all the ANSI A300 standards and to buy all of them it's like $200 if not more. Is their a way someone like myself can get these standards or something similar without the hefty price tag?