“When Snap goes public, I hope people see these towns are hard to beat for proximity to LAX and the clean beach,” he said.

Snap is trying to help its 1,900 employees prepare for the scrum for their money. One Snap employee, who asked to remain anonymous because the details were confidential, said the company had discussed bringing in academics from Stanford University to explain the impact that the I.P.O. could have on their lives. Google used a similar strategy for its employees when it went public.

A spokeswoman for Snap declined to comment.

In the meantime, wealth managers and others are preparing their advice. Howard Rowen, a financial adviser at Bank of America in Los Angeles who manages money for entrepreneurs and tech workers, said techies who made fortunes at a start-up might think they would hit the jackpot again. Instead, he said, that often doesn’t happen and coders, engineers and others should regard the I.P.O. as a once-in-a-lifetime event.

They should also diversify their assets, Mr. Rowen said. “Entrepreneurs have strong emotional ties to their companies and their stock, but things don’t always go right,” he said. “It’s hard to convince them that they need to invest in something other than their own company.”

Snap has already changed the face of Venice, a once bohemian beachside section of Greater Los Angeles. When Mr. Spiegel and Mr. Murphy moved Snap to the area in 2013, they put the company in a single beach bungalow near the Venice Beach boardwalk. Now Snap’s employees have more than tripled from 600 people at the end of 2015, and the company owns and leases several buildings tucked discreetly amid shops and homes.