The problem with the hole is the horizon. Most important part to remember is that the level of the horizon relates to the height of the camera or viewer. The horizon in this case is about eye level, which means the car would be about 2 metres higher than ground level which would indicate a pretty steep hill behind the the building, which is contradicted by the floor behind the door to the left (which is extremely long, like probably 3 times the room size or more).
Other than that, I don't see any issues. The stuff behind the door just needs to sit lower by about a human length.