You can keep the image texture maps for roughness, height and normal and then just use a color instead of an image texture for the base color scheme.

Yes all parts, except the hinges are using texture maps so you can use your own or disable them and use just a PBR set up. Everything has a principled shader so their is a lot of versatility.

The modeled is rigged so it functions like a regular gated table. The bones have constraints so each part works properly within the range of normal limits.