This is interesing take on the despair challenge. Seems like an orginal idea to me which is a good thing. I think there really isn't much wrong with this photo. I like the B&W and framing. I really think you did very good with this challenge and look forward to your photos for future challenges.
Very cool picture but did you look at your Title before you submitted it? The number is "300,000" I think. You should have made it "3,000,000" instead to give more impact as well. :)
This brings back memories of my childhood and of finding an old car out back of our property. I wish there were a bit less clutter and a bit more contrast, but it's still a good image!
Good stuff. rhythms and patterns are very nice. Very subdued grays here. Have you tried adding more contrast to give lighter lights and darker darks? I'm not sure if that would improve the image, but may well be worth trying.