[6] Until 1915, the Gould Coupler Company "was consistently prosperous, made large earnings, the greater part of which was reinvested in its business, and very few dividends were paid."

"[5] In 1915 and 1916, due to "stringency in the money market" and a protracted strike at the Gould Coupler works, he needed significant funds to finance the Gould Coupler Company operations, so he agreed to sell Andrew Carnegie certain parcels of land at Fifth Avenue and 90th Street for $1,687,500 in December 1916, which was finalized in February 1917.

Gould bought the property, which was the site of the William Rockefeller house at Fifth Avenue and 54th Street, in 1925.

[19][20] Gould acquired Greyrock, a roughly 53-acre estate in Port Chester, New York,[21] where they lived together for many years.

[10] Around 1908,[22] Gould hired architect John Russell Pope to design a hunting and sporting residence, later known as Chateau Ivor or Ivor Manor, for him on his 1,000 acre estate in Dix Hills, New York, on one of the highest points on Long Island.

[23] The home, which was constructed by Walters & Woodhill of Flushing, was designed in the style of Louis XVI.

Through his son Henry, he was a grandfather of Henrietta Colton Gould and Jane Adelaide Gould (d. 1979), who married Sedgwick Minot in Buffalo in 1916 (and divorced in Paris in 1926),[24][25] and lived most of her life, since 1919, In France and devoted her energies to saving the remains of the estate of Cardinal Richelieu, in Rueil-Malmaison.