I'm a lawyer in San Francisco, and currently live alone in my apartment, which I love. (I have a cat, as well, but the cat wouldn't be here when you are, unless for some reason you wanted to have (or didn't mind having) a pet stay with you during your visit.) It's situated only a half-block away from the energy of Haight Street, so it's easy to walk a few steps and be in the midst of everything it has to offer, while also being able to be home in less than a minute. (It's rare to be able to hear Haight Street from my apartment...for example, when the Giants were winning the World Series.) The place is very comfortable, and definitely spacious for a 2 bedroom place. The kitchen has pretty much everything you would need (for ex., dishwasher, disposal, etc.), and there's a gas grill out back on the patio.
If you wanted/needed a car, I would be open to making it available to you.
I'm still pretty new to this website, but I'm happy to tell you more about me or answer any questions you have.