David,
Once again, don't listen to the pr!cks on this forum tha give you sh!t. Go at it smart, pay for your equipment with cash until you figure out what to finance, and keep asking questions. No question is dumb, no matter what the salty veterans say. Sounds like you are approaching jobs safely, and make that your number 1 priority. 2 should be good value for the customer, and oftentimes that means educating them. Keep learning trees. I stopped the tree removals because I'm beat up. But I know root systems and keep learning about them because I wreck them. You are young and can learn a little about a lot, or a lot about a little. Your choice, but keep learning, be smart about your money, and you'll do fine.
Bob