He built a house, which he still has, but graduated over the years to a scale-model of the 155-years-old Duart House in Havelock North, and currently has designs on "an iconic Napier building", the chosen one being the County Hotel in Browning St, originally the offices of the now long-gone Hawke's Bay County Council.
He's already gathering the pieces for the project, but it could, with frustration, partial demolition and remodelling along the way, be more than a year in the making.
Beauty is, however, in the eyes of the beholder, and Mr Catley looks across the expanse of the Centennial venue, narrows the gaze to one or two displays of his fellow exhibitors, and says: "I'm absolutely staggered. Oh my god, they're absolutely amazing."