Talk about going to the city...I'm a Fine Arts student in New York City, and I've been in a couple student group shows in an art gallery both on campus, and outside galleries. I've also submitted some photographic works. The only work I've ever sold so far was a lithographic print...and what I earned from it didn't even last me a weeks worth of meals
From what I've learned...it's pretty "successful" for a (lesser known) gallery to even sell ONE or TWO pieces per show...then you have the BIG name galleries like Larry Gagosian, Matthew Marks, Pace Wildenstein, Barbara Gladstone, and Tony Shafrazi representing your world famous master contemporary photographers, and draw ALL the attention. Furthermore, these gallery owners will usually only consider representing artists through connections and VERY close ties with trusted associates.
Show openings usually occur on Thursday evenings, and therefore many of my professors choose to hold their solo show openings on Saturdays in order to draw in a bigger crowd. It's a great experience some of these openings...in fact, I went to one of my professor's shows and Joel Shapiro and Chuck Close were attendees.
My intro-photography professor a while ago told us about the HUGE influx of artists/photographers/musicians/writers etc. coming into NYC from all over the world, compared to the 1980's when the NYC art scene was so "small"...now it's just scattered all over the place (esp. now the young artists emerging in Brooklyn).
Take Japan for example...many artists (like the great successes Mariko Mori, Takashi Murakami, and Yoshi'tomo Nara) came from Tokyo to NYC, because gallery shows in Tokyo were often way, WAY too expensive to stage, while already KNOWING money will be lost rather than earned (one reason is Tokyo art galleries are very wide spread apart, not densely concentrated, one after another like in Manhattan...the latter giving more opportunity for art collectors to "gallery-hop").
Sorry I drifted off...but in response, IMO, if you want to make a living off your photographs, I think more can be earned off stock photography definately...try it out.
If not, then come to the city, lol. You never know. That last professor I mentioned was lucky. His story goes, when he first moved to NYC from Michigan, he got an apartment in Union Square. It just so happened to be that he shared his apartment building with legendary photographer Imogen Cunningham. He later sold some of his work to a young man who also lived in the building. His (much older) wife was the head of the Givenchy USA branch and she later bought the rest of his work.