Belle Vista trailer park was one of the very few low-income areas from which students could get into the Palo Alto school system. Palo Alto is very strict about that - they even have an online form for reporting out-of-area students.[2] For poor people, there's the crappy Ravenswood school district. On the other hand, the trailer park is mostly retirees.

There are trailer parks all along the coastal area of the bay on the SF peninsula, dating from when that area was used as trash dumps. Google HQ is next to a former trash dump; Shoreline Park is a landfill, and in its early days had methane fires. Because no one wanted to develop that property, it came with a permanent tax exemption, which SGI exploited when they built there. Menlo Park had a dump too; that's now a park. Palo Alto recently closed the last section of their coastside dump and turning it into a park. (All the local trash is being sent to a huge canyon east of San Jose.)

Here's the trailer park nearest to Google HQ: [1] That big square thing in the background is the air intake for NASA's wind tunnel.

[1] https://www.google.com/maps/@37.4172537,-122.0736559,3a,75y,... [2] http://www.pausd.org/registration/proof-residence-requiremen...