Since the only way to gather the required gold is through trade, a strong navy is essential. There is plenty of Wood near the base, and an island at the eastern edge of the map has Stone Mines. Farm, hunt and fish until there's enough Food to reach the next Age, and start building the wonder. Upgrade to War Galley and build at least six or more of them, build a Light Transport and prepare two villagers. Ferry the villagers to the small island beside the red base for the purpose of repairing the War Galleys. Escort them with the War Galleys.