National Self Storage The Schomac Group, Inc. was formed in 1973 in response to a number of investors who sought the counsel and assistance of its founders, W. Michael Schoff and J. David Mackstaller. Today, Schomac is the hub of a group of companies that have evolved to perform specialized real estate and investment functions.In 1974, Schomac opened its first self-storage facilities in Tucson, Arizona. It was quickly discovered that self-storage was a unique business. Therefore, National Self Storage Development, Inc. and National Self Storage Management, Inc. were formed to further develop this business for Schomac and its investors.Originally, self-storage was considered by many to be an industrial or warehouse related use.