Billionaire Marc Lore has outlined his vision for a 5-million-person new city in America and appointed a world-famous architect to design it. Now he just needs somewhere to build it and $400 billion in funding.

The former Walmart executive last week unveiled plans for Telosa, a sustainable metropolis that he hopes to create, from scratch, in the American desert.

The ambitious 150,000-acre proposal promises eco-friendly architecture, sustainable energy production and a purportedly drought-resistant water system. A so-called “15-minute city design” will allow residents to access their workplaces, schools and amenities within a quarter-hour commute of their homes.

Although planners are still scouting for locations, possible targets include Nevada, Utah, Idaho, Arizona, Texas and the Appalachian region, according to the project’s official website.

The announcement was accompanied by a series of digital renderings by Bjarke Ingels Group (BIG), the architecture firm hired to bring Lore’s utopian dream to life. The images show residential buildings covered with greenery and imagined residents enjoying abundant open space. With fossil-fuel-powered vehicles banned in the city, autonomous vehicles are pictured traveling down sun-lit streets alongside scooters and pedestrians.Another image depicts a proposed skyscraper, dubbed Equitism Tower, which is described as “a beacon for the city.” The building features elevated water storage, aeroponic farms and an energy-producing photovoltaic roof that allow it to “share and distribute all it produces.”

The first phase of construction, which would accommodate 50,000 residents across 1,500 acres, comes with an estimated cost of $25 billion. The whole project would be expected to exceed $400 billion, with the city reaching its target population of 5 million within 40 years.Funding will come from “various sources,” project organizers said, including private investors, philanthropists, federal and state grants, and economic development subsidies. Planners hope to approach state officials “very soon,” with a view to welcoming the first residents by 2030.