I agree with your theory 110%. Its a great idea, and it can be done, but not for $30, and certainly not safely for $30. Have you priced a sealed fan motor lately ? The plastic bins alone are a bad idea. They are designed to "contain". And contain they will, even fumes. When the motor becomes gummed up with over spray, and it will, they will heat up, the bins by design will contain the fumes, thus the recipe for a time bomb. Especially with your longer , deeper plastic bins. I would no sooner have one of these in my home than a rabid Hyena, but to each your own. I am making a point from a parents point of view, kids should not do this. This post should be taken down or at the very least edited so that kids who see should be made aware this is not a simple home project, and should be done only with an educated adults supervision.