Unfortunately lodging in the Bay is not cheap. However! For a slightly more budget-friendly option, you're welcome to look into booking a hotel or Airbnb on the outer edges of San Francisco, or in our fair city of Oakland. Travel across the Bay will take about 20 minutes by Bart.
For proper hotels, you'll likely have better luck booking on sites like Booking.com, Kayak.com/hotels or Expedia.com/hotels rather than booking through the hotels directly.