Cost for the Lykan is 15000 Gold
Service time for the event is 10hrs.  

Discount by Tiers is: 30%, 35%, 39%, 45%, 50%, 60%, 75%, 100%
Required PI to win the car is: 351, which is all upgrades except for all tire upgrades and the last aero upgrade.

Cost for PI 351 = $4,571,400 (-3 Tires, -1 Aero)
Cost for PI 354 = $6,071,400

Total event winnings = $2,500,000 (Confirmed, Thanks nissangtr786 & Abel D.)

Think carefully before starting this event, as you will need to farm approx $3million over the next 10 days ($300,000 per/day) to win the car.   This is not going to be an easy task, you will need to maximize Jo's missions to do this.  

4 flash events per day . (Approx 25000 average = $100,000)
Jo's missions (Approx 4000 per race, so about 50 races to earn $200,000)