Again, Wikipedia, “The term hacienda is imprecise, but usually refers to landed estates of significant size, while smaller holdings were termed estancias or ranchos . . . In Mexico, as of 1910, there were 8,245 haciendas in the country. In Argentina, the term estancia is used for large estates that in Mexico would be termed haciendas.
“In recent decades, [however] the term has been used in the United States for an architectural styleassociated with the traditional estate manor houses.”
The hacienda style that you can find in Palm Springs typically have reddish brown tiled roofs, white or beige stucco wallswith plants growing up them, colorful shuttered windows, and covered patios.