Here is a description of the quantity of the PVC materials (for the simple version) to help you make a cost estimation of the construction. Except the 12 meters (or 39.5 feet) of Tube you are, also, going to need:
The PVC type needed for this project is called 50mm diameter High pressure 10 or 16
Atm (or 2” inch diameter Schedule 40 or 80 PVC will be the equivalent in the USA).