After his term, Cusack decided to return his attention primarily to his outdoor advertising business, which had grown considerably in size to more than one hundred offices with an annual revenue of over $20 million.

[citation needed] At the pinnacle of his success in business, Cusack bought the entire unincorporated town of Cascade, Colorado, at the Ute Pass in the Rocky Mountains.

He hired architects and contractors to build a plush mansion nestled in the Ute Pass, which he named "Marigreen Pines" after his wife, Mary Green.

Having lived through the Great Chicago Fire and experienced so many early losses in his life, Cusack built Marigreen Pines out of brick, marble and concrete to safeguard his family from harm.

Marigreen Pines became a much loved mountain home for Cusack and his family, where he routinely and graciously hosted many friends and relatives, engaging them in lively conversation and debate.