Hi Chris, Rayaans, Chesterman and Gliderpilot thank you very much for your advice on my first step of the plan (selecting a car for the trip). I thought of driving my lexus as its comfortable and trust the car with the way I maintain it (the kind of bond between man and machine). After further reading I also found that I need passage permits for for atleast 3 countries on the way and and price depends on how much your car costs, so the more expensive the car, the more you have to pay for import permits for various countries along the way. It seems better to take some cheap car like hilux, old landrover. I am even considering my old Honda accord if I decide to go tru Iran and pakistan as this route seems drivable in a car as it dosent touch himalayan belt.