[agracier]

well you could make the city alittle smaller and just put the famous buildings etc in it, i would like to make it but i don't know how to build maps, and create buildings etc...
if someone could help me with making a map and buildings i could try and place them everywhere even if it would take me weeks

Weeks? You must be kidding. Populating takes months if you want to do even a halfway decent job on maps with large and dense urban areas. Maybe you could do it in the span of weeks, but I doubt without going absolutely bonkers in the meantime ... ha ha.

And then add some extra months into the equation for making buildings from scratch. And on top of that there are so few members here who can create 3D objects to begin with, far less than can make maps.