Getting EVERYTHING into UE4

So, I got every assets I have thus far created into UE4. Instead of creating any more models, my aim from now until submission is to texture as much of my existing models as possible. They are already unwrapped, I just need to put in the time to get a material onto them. As you can see from the screenshot, Lots of the "uppertown" assets are missing textures. I have prioritised the lower town, and have completed 95% of it as it was the more detailed part of the scene in the first place.

EVERY ASSETS AND TEXTURE WAS CREATED AS PART OF THIS PROJECT WITH THE EXCEPTION OF THE GROUND MATERIAL IN THE LANDSCAPE AND THE SKYBOX MATERIAL.