An increasing number of the world’s wealthiest people are buying non traditional homes outside of where that usually live and the vast majority own  two or more homes, new research shows.  Ultra-high net worth individuals (UHNW)  are classed as those with assets above $30 million and are discerning about what they buy, says the research report from Wealth-X and Sotheby’s International Realty.  UHNW buyers look for residences that are environmentally sustainable, technologically sophisticated, or that fit better with their personal and family needs.  The average buyer in this sector is 63 years old, married and has a net worth of US$165 million. The top place to buy a second home is the United States followed by the UK and then Switzerland.