According to the Luxury Real Estate Report 2015 published by Sotheby’s and Wealth-X,  the average UHNWI property owner in New York City  is aged 60. 40% derive their fortunes from financial services. 74% are self-made. They have median net worth of US$120mn. Attractions include low interest rates and an ‘entry point’ to the international market.  The top country for foreign owners is the UK.  

Source : 31 May 2015/Sotheby’s Wealth-X/ New York/ RES