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The house was named Purple Hill, for the viper's bugloss plants, which would flower each summer, on the over 1000 tonnes of earth covering the house. The structure cost around $400,000 to build in 1988. Lishman once talked to an American mobile home builder about how his building approach would protect against tornadoes. Producers of the movie "Fly Away Home" used Lishman's property for filming, but not his house, believing that it would hurt the credibility of the film.