One unique option would be to download a city buildings asset pack from the Unreal Engine marketplace. There's a bunch of good quality free ones, such as this: https://www.unrealengine.com/marketplace/en-US/product/city-sample-buildings
This requires downloading Unreal Engine. However, after you do that, and open up the asset pack, you can export the individual building assets and import them into Daz.
I believe that you are not supposed to use UE assets outside of UE, however I wouldn't be too concerned if you are only using them for rendering. I don't expect you would receive threatening emails from any concerned parties.