"When I saw a business opportunity, I took my entire life savings — I didn't get a government loan, didn’t get a government handout — I started a business in my barn and built it from scratch," Sheehy told a crowd of supporters at an August rally. He later said on a November podcast appearance that he and his wife "bought our land, and we lived in a tent, literally, for months, and we built the barn that we lived in for four and a half years. And it was like bootstrap central."

According to the Beast, Sheehy's forthcoming memoir, Mudslingers: A True Story of American Firefighting, includes a key passage about his family's largesse. While the 38-year-old ex-Navy SEAL and his wife saved up $300,000, it still wasn't enough for the roughly half million dollars needed to buy the company's first two planes.

At that point, Sheehy wrote that he called his parents and asked them for the $100,000 they had saved up for his college fund, since he attended the tuition-free US Naval Academy. He also called his brother Matt, who is president and CEO of an energy infrastructure company, and gave him an equity stake in the company and access to his company's financial records in exchange for a "significant cash investment."

"In addition to the $100,000 loan they offered me plenty of free advice, which as anyone knows in family business, can go both ways," Sheehy wrote, adding that "nothing would have moved forward without them."

If elected, Sheehy would be one of the wealthiest members of Congress, with a net worth between $74 million and $200 million, according to his financial disclosure forms. According to Ballotpedia, Sheehy is one of three Republican challengers for the Senate seat, with Rep. Matt Rosendale (R-MT) also contemplating a run.