[3][4] He worked in a restaurant, marrying the owner's daughter, and saved enough money to buy a small vineyard in Glendale, CA.

[3] Visiting the Cucamonga Valley, he purchased eight square miles and planted a hundred varieties of grapes,[3] which became the foundation for his Italian Vineyard Company.

[4] To accommodate Guasti's workers, a village was established in 1904, featuring a company store, inn, bakery, fire station, hotel, post office,[5] and, at 5000 acres, the world's largest contiguous vineyard.

[2] Giovanni's grandson Joseph Jr taught for ten years as a professor of Enology and Viticulture as UC Davis.

[7] In 2001, the San Diego–based developer Oliver-McMillan purchased 49 acres surrounding the historic Guasti Village and, in cooperation with the city of Ontario and the Ontario Redevelopment Agency, is working to restore historic buildings and develop office buildings, a full service hotel and a walkable entertainment district.