If you're looking for that classic "metropolis" vibe without the cost, KitBash3D provides several entry-level "Mini Kits" and sample assets for free: Neo City (Mini Kit)
: Inspired by the extravagant architecture of Paris , New York , and Los Angeles circa World War I. KitBash3D Models – Art Deco Free Download
: Includes lavish museums, theaters, and government buildings. If you're looking for that classic "metropolis" vibe