Equestrian Grooming Box Design

I need a new equestrian grooming/tack box designed for both storage and standing.

Requirements:
- Primary material: Plastic
- Features:
- Tray that lifts out
- Reinforced handle for carrying
- two hinges either side of lid to attach lid to box securely
- Purpose: Store grooming tools or tack and serve as a standing platform

Ideal Skills & Experience:
- Experience in designing plastic storage solutions
- Knowledge of ergonomics and stability for standing platforms
- Proficiency in CAD software for design

Please include examples of previous work and a timeline for completion.