San Francisco just looks like an interesting city to me, which is the main reason I would like to visit.
The visit will happen when I am in good traveling shape and have the money.
A rough estimate of the costs is:
Plane Tickets: $525
Hotel: $150 per day
Food: $30 per day
Misc: $25 per day
Total: $200 per day + $525
I will update the blog when I am ready to plan my trip.