Throwing Shoe Pre Alpha

This is a work in progress. I'm trying to create a shoe for throwing (shot put/discus).
My goals are

1. Form fits to my feet
2. Works well
3. Survives abuse and stress
4. Looks different than base shoe
5. Cost less than $30 in total
   The model is based of a Adidas shoe, but my goals are that it turns out completely different and unique. Any help or tips will be appreciated.