A startup has told Los Angeles city officials that it wants to build a citywide fiber-to-the-home broadband network and that it also hopes to build nationwide Wi-Fi and cellular networks. The proposal sounds unlikely to succeed, but it’s certainly ambitious. It comes in response to a Los Angeles city government request for information (RFI) regarding a plan to build a fiber and Wi-Fi network. The Los Angeles request itself struck telecom experts as unrealistic. The city wants a vendor to build a fiber network at an estimated cost of $3 billion to $5 billion, offer free Internet to all residents (while charging for faster speeds), and make the infrastructure available to any other service provider on a wholesale basis. The RFI deadline passed Friday, and only one company has made its full response to the city public.