The Plains Marks Decade Of Comfort, Friendship By LIBBY CUDMORE • Special to www.AllOTSEGO.com ONEONTA – In many ways, Milly Parish thinks of The Plains at Parish Homestead as the old house. “I was really inspired by the song ‘This Old House,’” she said. “The song is about someone reminiscing about the old homestead, which has been abandoned.” But her homestead was not abandoned. For the last decade, civic leader Gordon B. Roberts’ dream has been a home to retirees.…