medical billing sounds like a fancy cute little word -- but the details of it are VERY complex and involved. Yes there's software now out there that automates many parts of it -- but there's still training, insurance, software costs, computer costs, learning curve, previous experience, etc. involved.
Best bet is to HIRE people experienced in it and find places that have a NEED for help in medical billing. I'll you this much, most big and small cities sure don't have that need. They're saturated with it. But i'm sure there's rural towns, alaska, new clinics, etc. that could use quick temporary medical billers to help them. Approach any new venture with 1) What do i know so far about it? 2) Waht experience do I have? 3) What do *I* bring to the table and 4) If i don't have what it takes -- can i HIRE people who do have that experience???
Henry Ford never knew how to build or fix a car. But he hired tons of intelligent able-bodied men who did. He used them to make billions.