So far it has cost me £800 GBP all sourced from Bricklink and paid for from Bricklink sales from my own shop which at present is my only job as i am unemployed, so time is one thing i have. Finding the parts has not been to hard most have come from UK a few from the EU and a lot from USA/Canada and 1 order from Australia! i suppose most of the cost was shipping but i do not know any other way to obtain the vast array of parts needed any cheaper, and being nearly 98% reddish brown put the cost up. but i think it will be worth it. A total of 5 months buildtime so far with most of that waiting for parts.