20x20 Detached Carport Construction

I'm looking for a structural engineer to sign/prepare plan for submission to construct a 20x20 open/detached carport. The carport will primarily serve as vehicle parking.

Key requirements include:
- Use of 8x8 pressure-treated posts
- Metal roof
- No additional storage areas, just the carport

Ideal skills and experience:
- Experience with wood and metal construction
- Knowledge of building codes and regulations
- Ability to ensure structural integrity and durability

Please provide examples of similar work and a detailed estimate.