Cost $ of safe apt in San Fran for single RN?

If someone moves to San Fran for an RN position, makes say 45 - 50$ an hour (which apparently is around the starting wage that I've been told), what would be the average cost of an apartment in SF? Would you be able to live pretty comfortably on an RN wage?

Say you make 50$ an hour X three 11.25 shifts a week, your annual salary would be just over 80 thousand dollars.

So if you take away taxes, you would probably have 45 000 - 50 000 $ left...would that be enough to support a single person with NO kids in SF?

Would 2 thousand - 2500$ per month be enough for a fairly clean nice apt?...

I wouldn't be looking for a super fancy one just something basic to live in where its safe. Square footage isnt a big deal with me...I could live in something that's 600 square feet.