An influx of immigrants who pay $5 million for a visa could increase demand in the “ultrahigh end of the real-estate market,” said a National Association of Realtors economist.An influx of immigrants who pay $5 million for a visa could increase demand in the “ultrahigh end of the real-estate market,” said a National Association of Realtors economist. An influx of immigrants who pay $5 million for a visa could increase demand in the “ultrahigh end of the real-estate market,” said a National Association of Realtors economist.   Read More MarketWatch.com – Top Stories