In August 2020, 35-year-old Adam Masato stumbled upon a video on YouTube by creator Robuilt outlining how he makes money renting out tiny homes on Airbnb in Joshua Tree, California.

At the time, Masato and his wife, Diana Hernandez, had been living rent-free in a spare bedroom of his in-laws' house for almost a year. The millennial couple saved almost 100% of their combined income of $150,000 per year; Masato is a manager at a healthcare IT company, while Hernandez is a therapist with her own private practice.

Besides saving all of their income from their day jobs, the couple also rented out the condo they moved out of in 2019 to pocket an extra $1,100 per month in rental income, according to records reviewed by Insider. While their expenses were low, the couple invested their money aggressively, and Robuilt's YouTube video came into their lives just when they were looking for the next opportunity to invest in real estate.

By the time Robuilt's video popped up on his YouTube feed, Masato was already burnt out from scrolling through overpriced Los Angeles real estate listings. The video outlined every detail of making money through luxury Airbnb listings with $275,000 in startup costs.

From the video, he learned:

"The second I saw that video," Masato says, "I stayed up late just looking for land and I was like, 'Wow, he's not lying. This is affordable!' I started doing the market research and saw that these Airbnbs were booked. The numbers he was throwing out, it seemed feasible." 

Eight weeks after the video was published, Masato closed escrow on his own piece of land in Joshua Tree for $39,806, which he paid for with savings.

After closing escrow on the land, the next step was to find a contractor to build a pre-fabricated home. Masato met with many different manufacturers before choosing Orbit Homes, a low-cost, environmentally-friendly, pre-fab manufacturer based in California.

Masato says, "I had been reaching out to pretty much every cool housing pre-fab company I could find. I really like the fact that Orbit Homes has upfront pricing. Everyone else was kind of like, 'It depends on an unlimited number of factors.' [Orbit] gave me a more concrete idea of how much it was gonna cost, and they were really cool people, too."

Masato's Airbnb listing, a 935-square-foot, two-bedroom, two-bathroom home, is completely booked through July. According to US News Travel Guides, June and July fall outside of peak tourist seasons in Joshua Tree's high desert as temperatures sometimes rise above 100 degrees. The success of Masato's Airbnb listing can be partially attributed to luxury finishes, such as a private hot tub, and sleek design that drive up the cost per night.

Instead of a traditional mortgage, the couple opted to take out three personal loans backed by their cryptocurrency holdings and a home equity line of credit against their condo. 

"Several lenders told us this would be a complicated loan to obtain," Masato says. "Specifically because it is a single-wide manufactured home on private land, not a mobile home park; also because it's not a primary residence." So they went a nontraditional route.

Here's a breakdown of the investments and loans they used to pay for their short-term rental:

Masato explains, "The bitcoin-backed loans are at 0% with no monthly payments as long as they're holding my bitcoin as collateral. The caveat is, I can only borrow 25% of the dollar value of my bitcoin collateral. Also, if bitcoin drops in value below a certain amount, I will get a margin caller and have to provide more bitcoin as collateral."

After commissions paid to their property manager, a monthly payment of $732 for the HELOC, and monthly payments of $370 for the personal loans, Masato earns an average of $8,455 per month in passive rental income.

Masato says that if he could learn how to start a passive income stream from YouTube, anyone can figure it out on their own, too. "You don't need a specific skill set or education to do it," he says. "It's easy to learn, but it was definitely hard work, and it wasn't stress-free."

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