I agree -- you should see about dropping the environment idea and just focus on the assets. For individual assets like that I would first optimize the poly count if you're going for game ready; if you want to show modeling skill and don't mind the high poly you should drop the textures completely. If you're wanting to show…
I think you need to take a couple steps back to really build your fundamentals up before trying to make environments and a portfolio. Learning highpoly modeling to lowpoly game res with normal maps, and proper texturing techniques so you are not just pasting photos onto areas should be the first things to work on. 3D…