Well i picked polycarbonate because it seemed like a good decision- i had the option to import it from Russia so it would be cheaper then prefabricated poly greenhouses here!
Bending my own steel tubes is certainly cheaper- just got a price. Too bad your thread is missing a lot of pictures i have to see if i manage to find a step by step guide about how to fit the double polly, mount the blowers and also how to make the entire sidewalls go up! I'm a bit lost!
Thanks for the reply, means a lot!
EDIT:
P.S. would it be possible to mount the light dep tarp under the poly so it wouldn't be visible to neighbours? Gotta keep it stealth!
You can build a hoop inside the hoop, if that makes sense.