My reason for bidding on your project is that am a experienced product designer, with extensive experience in product development, and in particular CAD(3D) design.
I put down $125 and 2 days to finish your project, this is without revising any of your photos or sketches. Depending on the complexity of your ideas, these numbers might change, possibly for a quicker and cheaper delivery.
But regardless, I can guarantee a swift, professional and thorough execution of your ideas. And after the final proposal is delivered, and there are changes needed to be done, these will be done without any further addition to the final price.
Hope to hear back from you soon, and looking forward to starting your project.