Gray said he found documents showing that Gsantner once owned 20 or more rental properties, and still owned a $115,000 town home in Pima County, Arizona.

“He obviously enjoyed finances,” Gray said. “He was a numbers guy.”

These days, having a $5 million estate isn’t as rare as it used to be, according to George Morgan, a former stockbroker who now teaches finance at the University of Nebraska at Omaha.

“You would be surprised at the clients that I had who had two- to three- to four-million-dollar accounts,” Morgan said. “If you drove by their house or saw them walking down the street, you’d think they were just normal people.”

And, he added, there seems to be a culture of modesty about such wealth in Omaha. Morgan said the late construction magnate Peter Kiewit used to lecture employees against flaunting their wealth. And billionaire investor Warren Buffett is famous for his less-than-a-mansion home in Omaha, and his modest ways.

One relative said Gsantner was guarded about money because of his Depression-era childhood.

Tracking down his relatives proved a challenge. Only a few Christmas cards from relatives and family photos were found in the home. Neighbors knew little about him.