Upgrading in Apocalypse

One day, the whole world fell asleep. A long time later, the few who wakes up finds themselves in a world teeming with monsters. Neil Howard is one of these people who wakes up. Finds himself in a dilapidated room full of tree roots and vines, and he learns that he have an ability that will help him survive in this post apocalyptic world. While everyone are trying to look for resources, he is just staying on his base with unlimited water and food. While people are painstakingly making fortifications and other types of protections, he is just sitting on his chair, inside his house with automatic defenses. This is his story, along with his power to upgrade everything.