Niether. I chose not to participate in any activities religion, therefore I am not an Atheist, Deist, or Theist. Religion is secondary to my being alive, and if I chose not to participate, I also shouldn't have to put up with people attempting to label me according to something that has nothing to do with reality at all.
Considering you have a masters or at least an undergrad, you could probably ride the recession out inside a classroom.
A startup seems like a relatively quick return but its a gamble.
As for a career, both other options constitute as elements of one. If you mean striving to have some polished, dignified social timeline in your field, I say screw it, live for now.