GB: Rendering or Prototype?

I'm Abdul Lutfi. I'm doing a groupbuy in the near future.

I'd rather built a prototype first than just doing rendering.

In doing so, I can better ensure the quality of the end products I'm fulfilling to my buyers; you guys.

But I need to hear from you of your responses.
Here is a short Interest Check Survey.

https://docs.google.com/forms/d/e/1FAIpQLSf5DdZ5w5rAbqEzdqxhljl4OWAPfKUeuka39t9W3Czq6_BrKA/viewform