I live in the mission and pay $1850/month for rent. One nice thing about living in the city is that utilities are pretty cheap. I pay about $100/month for everything. In Texas, electricity was at least twice that. Plus food isn't terribly expensive nor is transportation. In short, rent is terrible, but if you can make that, SF isn't too bad a place to live.
When I lived in SF last (2 - 3 years ago), groceries were inexpensive in comparison to rent and eating out. I think my girlfriend and I spent around $200 per month on groceries (shopping at a Safeway in the financial district) vs $2.1k for rent and $50 - 100$ every time we went out for a decent meal. If you want to be in the city and save money by cooking it does make a big difference.
