If you wondered why the Wilf boys were so eager to put a ton of their own money into the new U.S. Bank Stadium, this might explain why.

The Wilf family has money because they understand money investments and business. Some will argue some of their ways of doing business is not morally correct, but the bottom line is they thoroughly think about every dollar they spend.

Forbes just released their annual estimate of NFL football teams, and the Vikings' (ranked 17th in the list of highest valued teams in 2016) value increased by 38% because of the opening of the new stadium. The team's value is now estimated at $2.2 billion, an increase of nearly $600 million compared to the value in 2015.

In case you were wondering how the Green Bay Packers compare, they're valued at $2.3 billion, up 21% from last year. The long-standing #1 spot belongs to the Dallas Cowboys with a value of $4.2 billion.

So was buying a the Vikings a good investment? The answer is likely 'yes' since this 1-year increase in value is pretty close to what the Wilfs paid for the Vikings in 2005.