Filed under: Rentals for the Rich By Sally Kuchar Oct 7, 2013, 3:56pm PDT If San Francisco's rising rents are making you look outside of the city, don't consider Silicon Valley. This 5-bed, 5.5-bath, 5,000 sq. ft. McMansion in Los Altos is asking a mind-numbing $27,000 per month. [Craiglsist]