it's alright to use default buildings in cities, I've seen a few people do it
but it's kinda silly to make that the centerpiece on your wip town like what's the other building
its freaking hard to make a building.
so i have to take some saves, but the copyrights are an issue.
when i make a large building, it gets stuffty.
only good at 16x16 bases.
1 reason to not buy a mansion : too many rooms and too much space, you only use part of the mansion and the rest collects dust.