Elon Musk told Miami’s mayor that the boring company could dig a two-mile tunnel under the city for as little as $ 30 million.

Mayor Francis Suarez shared the details of his’wonderful call’ with Musk in a video posted to Twitter.’he’s focused on trying to deliver a project that will have the maximum utility for our residents for the least amount of money,’ he said.

Just had my call w/ @ elonmusk regarding @ boringcompany tunnels coming to miadetails below pic.twitter.com/nsjfycvgeq.

Musk tweeted that he had already spoken to Florida governor Ron desantis about the idea.’if Governor & mayor want this done, we will do it,’ he said.

Suarez said Friday that he will speak to desantis and the mayor of Miami-Dade County. He said he will talk to desantis, the mayor and desantis.

A tunnel under the port of Miami was less than a mile but still cost around $ 700 million. The city is built on limestone, which is spongey.

Musk has talked about digging tunnels as deep underground as skyscrapers are tall. The Miami Herald reports that the limestone bedrock and the impact of rising sea levels were among the talking points.

Musk started the boring company in 2016. The first commercial service is nearing completion under the Las Vegas Convention Center. The company is also in negotiations for a tunnel in San Bernardino County, California.