Feud with the Couzens family kill Grayhaven?

Sumas once wrote, "Grayhaven was an entire community designed by Edward Gray. It was created out of the Grande Marais. It was entirely landfill. Two Fisher Mansions, part of the eastern Grayhaven compound, were built on the landside of Starboard Lagoon. The island had four homes. The Garwood mansion is now gone but three still exist surrounded by new development of dubious value. The western land side was off of Port Lagoon. Seven homes were built there. All are now gone. Only thirteen homes in all were built. Many people blame the Great Depression for the demise of the original Grayhaven but in reality Gray's legal feuds with City of Detroit [[corrupt) officials sealed its fate. Sound Familiar???? "
I came across some information that might shed some light on that short of seeing Sumas' work [[I don't know what she finished before she died recently- so sad both she and her husband Ron, as I understand, within a very short time.)
This from the Benson Ford Research Center's Oral Histories, then transcribed-
Attachment 27843
Frank Couzens, his son, was in city government from 1931 to 1938, first as a councilman then mayor. Father James, who fired Gray, was mayor from 1919 to 1922. I wonder if hard feelings continued?
From Wikipedia- "In 1902, Henry Ford was organizing the Ford Motor Company; Alexander Malcomson was a major stakeholder in the company.^[1] The two were seeking additional stockholders; Couzens borrowed heavily and invested $2500 in the new firm.^[1] Ford Motor Company was founded in 1903 with John S. Gray as president, Ford as vice-president, Malcomson as treasurer, and Couzens as secretary.^[1] Couzens took over the business management of the new firm for a salary of $2400.^[1] In 1906, Gray died and Malcomson was eased out of the business, and Couzens became vice president and general manager of the company.^[1] The company made both Ford and Couzens wealthy, due in no small part to Couzens's business acumen.^[1] However, the two men gradually grew apart, and in 1915 Couzens resigned his position as general manager, although he retained a seat on the board.^[1] In 1919, Ford purchased Couzens's shares in the company for $30,000,000.^{[1]"
[[John S. Gray was not a relative of Edward Gray)}