[oceanician]

a) how much do you have saved?

b) what knowledge do you have outside C i.e. Database? Can you model an app?

c) How many years are you willing to put aside for this? At least 2 would be typical, before you give up, but quite often it's more - say 4? Doctors often have loans to pay off, but after that I find they live very comfortable lifestyles - are you ready to go back to living on beans on toast, pot noodles, and other crap?

d) have you shown your idea to someone else?

e) have you tried to get a prototype built (think £20k, USD 40K) for 2 devs couple of months in RoR.

f) learn Ruby on Rails....make the prototype yourself.

/end of random thoughts.