The visit to Pretoria revealed that a major airport was being planned between Boksburg North and Kempton Park—at that time Palmietfontein Airport, Alberton, was the main airport on the East Rand. Israel realised that his property as well as neighbouring plots would inevitably be developed. The upgrading of Rietfontein Road, extending to Kempton Park, and the development of the N12 highway created the dominance of land extended along the North Rand Road. The two younger sons, Joe and Leonard, became involved in property development in 1960.