This is a somewhat interesting idea, but I doubt it can be done better or more cost effectively than what's available in a proper motorcycle shoe. They're not like super-cheap, but they're also not that much more than what you have to pay for regular shoes. My last pair of regular shoes cost me about $100 and you can find motorcycle specific boots for less than that. Or good ones for just a bit more.
But, as a project, it's interesting, perhaps you'll figure out a better option. When it comes to motorcycle footwear, it needs to allow the ankle to move front and back, with minimal twisting. It should provide some provision for skid plates and reflectors and needs to be somewhat water resistant.
I could see a 2 or 3 piece design where the ankle either pivots or has room in the front to allow forward movement and the bottom part of the skeleton could flex a bit and stretch/compress.