A job i did some time ago, dusted it off for this blog.
Most of the textures come from:
Some of the models i made myself, some come from free content in pages like:
CGTrader & Turbosquid.
The last image was an attempt to make it more visually abstracted which is something i've been interested in for a while now, i saw a Online course in domestika about that which caught my eye, i might give it a try and it might be of help if you're having the same problem:
https://www.domestika.org/en/courses/980-digital-illustration-of-architectural-projects