Hey guys,
I saw this thread. I am currently a fellow in rads. I got involved with this company in medical school doing marketing and sales for health and wellness products which actually compliments medicine quite nicely. You basically operate your own business. Without getting into details, it is not so difficult to build up a recurring revenue base anywhere from a few hundred dollars a month to thousands (depending on your effort). Trust me even a couple hundred extra a month can help you get through residency more comfortably.
If your interested I can tell you more. Just message me.