Industry average 300w panel (17% efficient) is about 1.6m² and comes in at about $0.40/W wholesale. At scale you can go cheaper. Manufacturing cost is likely lower. Shipping costs can be 15-20% on top of that.

~$120/m².

What would be helpful to know:

How much of every material is required/m²?

How much does 1m² weigh?

What is the 75% output lifetime?

Efficiency graph at varying solar iridescence?

Manufacturing yield rates?