"Editable Low Poly Apartment" is a very practical asset that will save you time, with only one building you can create several models, higher, wider, longer etc.
this asset also contains trees, animated flowers, and other animated objects (the car is included).
How to use editable low poly buiding to create a city: https://youtu.be/OHy5thfFDMM
add your touch by modifying for example the colors the shapes of the windows, doors "in edit mode" etc ...
I like modeling, especially in low poly, it is effective to communicate on project ideas and to render it is faster.