Post Apocalypse : Train house

*Post Apocalypse world concept.
*Someone make house by broken train. There are three floors in house and can go upstairs use ladder. 1st floor is bedroom and at the same time, also living room, kitchen... etc. 2nd floor and 3rd floor is storage. And also can stand guard in 3rd floor.
*Maybe there are some quest (for someone live there), or can find some important item for play, or plunder something, and so on.