Structurally Stable Greenhouse Design

I'm looking for a designer with some 'structural intergrity' experience to design a modullar walk-in greenhouse structure for snail farming.

**Features/Materials:
- Metal rodes/pipes
- Shade net
- Roof irrigation
- sections with foot path
- Modular structure can be assembled from 25 to 5,000 square meters
- Should withhstand bad weather