Well, in that case, my own intuition (and about 99.9 % of pundits) says shoot for the handhelds Get an imac and learn how to program for ipads, in your other set of spare time learn android. Set up a linux server with the database of your choice. After you have all that set up and mastered....at least a few weeks :) start spitting out services for your doctor friends.

As an aside, I have friends in the embedded arena who get backed by doctors looking to invest some spare pocket cash. I think once you get hacking, your friends will bug you to let them in on it.

Most important, Have fun!