Steel Building Plans for Ag Store

I'm seeking detailed plans for a steel building, either 40 x 60 or 30 x 50, with 16-foot exterior walls. This structure will serve as a retail space in the front and storage in the back for a small-town agricultural store in Reynolds, Georgia.

Requirements:
- Climate control for the front retail area
- Space for product display shelves and checkout counters

Ideal Skills and Experience:
- Experience in designing commercial steel structures
- Knowledge of climate control integration
- Ability to incorporate functional retail layouts

If you can help, please share your experience and a rough estimate.