Note: This model has a high vertices count because it was one of the only objects in the scene. The large number is mostly due to the complex grate mesh. If I was optimizing this for an engine, I would most likely use a plane with an alpha map. That cuts the vertex count down to 716 vertices.
The textures for this model are made up of two 1024×1024 color maps. I also used a 1k bump map for the floor section of the model.
Left (Roof texture) Middle (Floor Texture) Right (Floor Bump Map)