My daughter has lived in SF for about 6 years now, she has lived alone and with other girls as well as with a boyfriend in several different neighborhoods, Laural Heights, Cow Hollow, inner Richmond and the Haight. Prices vary of course from a $1100 studio, five girls sharing a nice Inner Richmond house that was $2500, and her and her boyfriend now live in a single family Victorian house with garage in inner Richomnd for $3500 a month.
When she lived in a basement apt in the Haight the rent was very reasonable....and as bizarre as it sounds, her next door neighbor was the actor Danny Glover!
She has always felt safe in the city and also knows which areas to stay clear of,
SF is a world class tourist destination so expect to see them wandering all about the city doing tourist things.
You will benefit from great TG services and like minded folks in SF! One of the benefits of living there for sure.
Don't be afraid to ask lots of questions here....we will do our best to get you info you can use