I'm still in the process of gathering information to start a tree trimming business and have a couple questions. Should you use an arborist for every job. If not, is there an easy way to tell when you might need one. I have trimmed many trees before and never used them, but every big name tree service website seems to use them. Next question, is it a good idea to start a tree trimming service at the end of fall/beginning of winter? Pros and cons? Thanks for your time!