Conversation so far:
Is the Frontier a property of Steve Wynn?
his success with his family's business allowed him to purchase a small stake in the Frontier Hotel and Casino
Where was the Frontier Hotel located?
Las Vegas
How much did it cost to build the Frontier Hotel?
Was the Golden Nugget a Casino?
Golden Nugget Las Vegas, a landmark downtown casino and one of the oldest casinos in the city.
Are theses properties, the Frontier Hotel and the Golden Nugget Las Vegas, still standing?
The New Frontier (formerly Last Frontier and The Frontier) operated continuously from October 30, 1942 until it closed on July 16, 2007.[1] The building was demolished on November 13, 2007.
What are some other facts about these properties, the Frontier Hotel and the Golden Nugget, with Steve Wynn?
Wynn renovated, revamped and expanded the Golden Nugget from a gambling hall to a resort hotel and casino with enormous success.

Question: Did he build anything else during this time period?
Self-contained rewrite: Did Steve Wynn build anything else during the time period 1967–1989 besides the revamped Golden Nugget?