I think something I love about this is that he didn't force himself to have to rely on everything from nature, it looks like maybe his grandparents or himself went out and bought some things to help him on his journey, like tools and concrete powder and other helpful survival equipment, even a razor to cut his hair. It just makes it feel more realistic in a sense, and he is very open about the tools he used showing them in many camera shots clearly and demonstrating the use. This is just a masterpiece of his entire 3 year journey, so much respect.