How a doctor makes money?

Going to try something new here Based on recent threads about salaries, I think we should start a thread on a topic that is really important but is often never taught in medical school and/or residency - the business aspect of medicine. So lets start with this scenario and question, have other members answer, and see if we can make this educational and informative. Feel free to answer, and ask questions. (ie socratic method) So topic 1: You are a solo practitioner, in your own... How a doctor makes money?
Source: Student Doctor Network - Category: Universities & Medical Training Authors: Source Type: forums