Its new development, Vivos xPoint, is billed as the largest private shelter community on earth. The bunker community houses up to 5,000 people and can withstand a 500,000-pound blast.
Take a look inside this modern-day Noah's Ark.
"This is the place you will want to be when the SHTF," or s--t hits the fan, according to a statement from Vivos Group.
Robert Vicino, owner of Vivos Group, told Business Insider that the company began hosting tours of the bunkers in May 2017 and has sold over two dozen bunkers for $25,000 each.
Although no one currently lives at xPoint, buyers are starting to build out the interiors.
The property contains 575 bunkers made of hardened concrete and steel.
Located in South Dakota, the structures were originally built by the Army Corps of Engineers in 1942 as a military fortress that stored explosives and munitions.
The bunkers were built to withstand a 500,000-pound blast from explosives within.
Since 1967, when the base was retired, the bunkers have been gutted. Vivos Group acquired the property in 2016 and repurposed it as the "ultimate shelter community."
Interest has exploded over the past year, due to the looming nuclear threat from North Korea, social and economic divides between Americans, and concerns over an economic collapse.
"People are now waking up to the threats that are all around us and seeking a viable Plan B solution," Vicino told Business Insider. He added that the bunkers provide an "opportunity to come out on the other side of what may be an extinction-level event for everyone else."
Shelters range in size from about 26 feet in width and 60 feet or 80 feet in length. There's room for over a year's worth of supplies, according to Vivos Group.
The bunkers have running water, but they do not come with electricity or air filtration. Buyers can hire a contractor or Vivos Group to outfit their doomsday den.
Vivos Group can pitch in as little or as much as the tenants like.
The company estimates the cost of retrofitting each shelter — complete with a blast door seal and interior lock, an escape hatch, exhaust and air vents, a propane generator, a fuel tank, electrical wiring, plumbing, a hot water heater, and a septic system — is roughly $22,000.
More "optional" construction, such as building walls, installing flooring, and managing energy storage, could run up an additional $10,000 to $20,000, according to Vivos Group.
They fit 10 comfortably, though some buyers may opt to turn their bunker into a deluxe suite for immediate family only. This rendering shows how LED screens might replace windows.
In this rendering, we see a three-bedroom home complete with a kitchen, living room, storage closet, and home theater. The blast door is not large enough for a garage.
There will be some amenities, including a full-time staff who will provide security, maintenance, and other support.
Vivos plans to transform several bunkers into a school, a church, a general store, and a medical clinic. (The company will not run the school, but rather, create space for it.)
A 99-year lease on a bunker costs $1,000 a year, plus a $25,000 deposit paid up-front. Vivos Group expects the renovation costs, including furnishings, will be many times that.
Vicino told Business that it recently added a shared, fully furnished bunker to its inventory, in which up to 24 individuals can purchase a private sleeping pod for $5,000 each.
"This price point makes Vivos xPoint the most affordable life-assurance solution," he said.