 The entire site would be surrounded by a wall, and full-time security guards would restrict access.According to the plans, co-op homes would be available for between $15,000 and $18,000, payable with a $1,000 down payment and monthly payments thereafter of between $140 and $180.Cortese had already built Rossmoor Leisure World at Seal Beach, California, in 1961, and he was then building Leisure World Laguna Hills in Laguna Hills, California, and another Leisure World in Walnut Creek, California.