It sold in 2012 for 25k. Check out most race car builds they all spend stupid money.
There are $70k civics around, you never get the money back and these guys always just try to sell the cars as whole.
Think about an A5 that's $40k base, put a pro cage in it and strip it, easy 6-8k, then blueprint the motor and custom tune, another 10-15, then suspension, brakes and safety gear