This length of an expedition would also require months of research and meticulous planning to acquire the permits and visas to legally pass through 16 different countries and potentially hundreds of local provinces. Border crossings and checkpoints would likely take you off the optimal route, adding more time and distance to the journey.
You would also need to stay informed about world news as you travel since many of the areas you must pass through could be experiencing civil unrest or natural disasters.
Pack weight would also be an issue for solo travelers traversing extreme climates and weather conditions. You could always swap out your warm-weather gear for insulated, waterproof items as you head north, but the amount of medical and survival gear needed to stay safe would add considerable bulk and weight.
Even with the newest ultralight gear, every ounce you'd need would add up and cause severe wear and tear to your back and joints. These items come at considerable premiums, and your bank account would quickly dwindle just with hiking boots alone.
The very best hiking boots, for instance, last for approximately 500 miles (804 kilometers). So, at roughly $200 a pair, you'd need to budget nearly $6,000 on footwear alone to complete the journey.
The walk also has shortcuts through several remote and rural areas, which would make it difficult to replenish your pack with food and water along the way. Even with access to a smartphone or satellite communication device, you would pass through several dead spots, making it challenging to translate, pay for goods and services and stay on the route without a portable map app.