The plans for SpaceX's BFR plant in LA are now well known. Here are some details for discussion.
Project development draft study: portoflosangeles.org
Map of the SpaceX future facilities: google.com
Port approval form: portoflosangeles.org
Aprox. 750 employees
32m(!) tall, 18859m2 main building
demolition/new construction expected to take 16-18 months total; this is split into many phases (like the gigafactory)
large items (composite pressure vessels from Janicki) will arrive to the factory up to three times per month!
Finished vessels would need to be transported via water due to their size
Regular F9 recovery ops will take place at the facility as well
Factory will consist of general manufacturing procedures such as welding, composite curing, cleaning, painting, and assembly operations
The facility is next to the Coast Guard, a minimum security prison, and a historic site; pretty run-down overall
Vehicle transport will be done via barge. Barge will remain in port when not in use
"Operations would involve development and manufacture of prototypes and first generations vessels within the proposed building. The facility would also establish the development processes prior to implementing production on a larger scale, which would not be accommodated in the proposed facility."
This means that San Pedro will not be the only BFR factory, only the initial one