Of course there are studios and hotel rooms with kitchen. You just have to search for them with any OTA (expedia, hotels.com). Make sure you check the description of the rooms and confirm that there is a kitchen.
1个月以上 is not long term at all. Your only option is renting through a rental company. And San Francisco area is notoriously expensive, esp. during summer time.
1个月以上 is not long term at all. Your only option is renting through a rental company. And San Francisco area is notoriously expensive, esp. during summer time.