Nothing to do with analyzing the dream, but oddly, (minus internal combustion vehicles) the first Vision I had in my head reading this dream was how my PC game "Oblivion" looks when played. There are ruins and beautiful landscape (Meadows, hills, mountains). The weird thing is I could imagine in my mind the house with no roof and walking around the scene.

As soon as you mention the milk I thought of an energy package also (before reading Olivers responce) Is similar to the milk and eggs in my recent entry.