Actually the epicenter of the city, will be north of the mega mall way in mainland.
I thouhgt making lots of parking buildings in the neck of the peninsula and tunnels towards underground parking lots along the main road.
Good time to confess I drew this map from a real city, a summer only resort in Uruguay, Punta del Este (34º 58'S 54º 57'W)
The tallest building of Punta is 50 stories I think. Mulligan would be a free trade area with a -big- seaport and perhaps capital of a Mercosur that includes Chile and excludes Venezuela) and with a huge floating international population that will need seafront condos