WeWork CEO Adam Neumann is such a big surfing fan he led the company to invest $13 million into a startup that creates artificial waves - check out how 'Wavegarden' works

Installing the smallest Wavegarden model will run you approximately $21 million, according to Wavegarden's website. This includes the cost of preparing and erecting the site, and installing the wave generating system and water treatment system, service buildings, and development costs.

Prices for larger Wavegardens aren't specified on the website and are set on a project-by-project basis.

Wavegarden estimates that venues will see an internal rate of return of 20% for a standalone facility. Surfers shell out up to $90 an hour to use Wavegarden's facilities, according to the Wall Street Journal.

Wavegarden has constructed three fully-operational units in Spain, the UK, and Austin, Texas. The latter, which was built in 2016, hit a number of roadblocks and ruffled the feathers of lawmakers and locals along the way. It is currently closed.

The Austin facility, known as Nland, began construction in 2014, but faced a lawsuit from Travis County alleging that its Wavegarden didn't meet state health requirements for public pools and hadn't applied for necessary permits.

The park ultimately reached an agreement with county authorities and opened in October 2017, but closed just a month later due to damage under the Wavegarden. Meanwhile, locals living near the park — built in a floodplain — complained that it was regularly spilling water into the surrounding area, flooding their front yards and driveways.

Nland is currently closed after being purchased by the World Surf League, according to its website, and will be redeveloped. Surfing blogs speculate that the Wavegarden "lagoon" — derided for its "crumbly, meandering waves" — might be replaced with a Wavegarden "cove," or another brand of wave pool entirely.

When Neumann directed WeWork to invest in Wavegarden, the company had recently received a slew of major investments and was eager to expand into other ventures. One of those was WeLive, a dorm-style residential offering that the company originally projected would have 34 locations by 2017 (it currently has just two locations).

It's not clear exactly where Wavegarden fits in with WeWork's business. At the time, WeWork referred to its Wavegarden investment as one of its "meaningful investments to significantly enhance our product offering."

Even Neumann himself has wavered when it comes to classifying WeWork's scope as a business.

"We ourselves are still discovering what is the best type of company that we want to be," he said when asked about WeWork's business category at a TechCrunch panel in 2017. "We're taking best practices out of the for-profit world and best practices out of the nonprofit world."