Dennis Olsen and Darlene Higgins Olsen put nearly three years of work into the 7,100-square-foot house on Thunder Lake in ...

You can’t talk about the house on Thunder Lake without talking about Dennis Olsen. For Olsen, who grew up in a low-income family and at one time lived in a $7-a-month apartment, the house was a dream.

You’ll have to boast a particularly robust bank account to nab billionaire Bill Koch’s newly listed wintry Colorado retreat.