Dave portnoy drops a record $42 million on a hedge fund managerโ€™s waterfront nantucket retreat. Verkkobarstool sports founder dave portnoy has bought a waterfront nantucket estate for $42 million, according to published reports, a record price for. Verkkobarstool sports founder dave portnoy just snatched up a luxurious nantucket compound for a staggering $42 million.