I'd estimate this cost in excess of 30k to build, and is an absolute bargain for anyone who wants to start out in rallying. Not my car by the way, just thought I'd flag it up!
https://racecarsdirect.com/Advert/Details/76223/renault-twingo-r1-professional
https://racecarsdirect.com/Advert/Details/76223/renault-twingo-r1-professional