The money thing is bullshit. The majority of cars in the Grassroots motorsports builds and all those other competitions could never be built for the money they say. Its not even the money in tooling for the machining but the actual material itself.
Thats more than $12.00 in round stock. They shouldn't count material prices of things you have laying around your shop. Its easy to cut a piece of material you have in stock to the exact length you need, machine it then justify the price based on scrap rates. In real life, you need to go to a scrap yard, route through junk for an hour to find the diameter you need, then buy the whole length and your over $12.00
For the people who don't buy raw material often, places usually charge you more for saw cutting the material to the length you need than it would be for the whole bar. A 6x4x8 inch piece of 6061 Aluminum actually cost more than buying a full 5 foot length of it becuase the metal suppliers just want to sell the material and not cut it.
Since you can can resell parts for these cars to recoup costs does that mean you can buy full lenths of material, machine parts from it and use that money to put into the car?
Those contests are neat but the rules are bullshit