I think they want to keep it very CHEAP and SIMPLE. Something a newbie could do in their driveway, or a high school kid that has interest could have hope of doing in working part time. I think CHEAP here wins over E.T. Seeing what you can run on a part time job budget! lol. Also, they want you to add the real cost of parts you may be donating from your garage/basement. Buying the car is part of the price of the total build. Simple too, something that a newbie to our hobby would understand and could probably do in their backyard.