PVC:

The PVC pipes will be making up the main arch structure of our project (Frame of the Structure). On the link below, the PVC Pipes that are 1-1.5 in x 10 ft 300 Sch 400, cost between $3.90 (2ft) to $17.13 (20ft). 

Link: https://www.lowes.com/pd/Charlotte-Pipe-1-1-2-in-x-20-ft-330-Schedule-40-PVC-Pipe/3359594  

Sand Bags:

The sand bags will be mainly used to hold down the structure, in harsh winds or other pressure that is applied onto it that would result in it falling over. On the link below, the sand bags are 14" x 26" and are able to hold 50 pounds of sand, and cost $15.79 (Quantity of 25 Bags).

Link: https://www.amazon.com/Green-Sandbag-Sandbags-Pounds-Polypropylene/dp/B010UGUFEE/ref=pd_lpo_vtph_tr_t_2?_encoding=UTF8&psc=1&refRID=EMMGC1W484R7A9K1NMA1 

Guy Wires:

The Guy Wires will be also be used to hold down the structures, using tension to hold the structure down and together. On the link below, the guy wire is 1/16'' x 50 ft Galvanized Steel and is Uncoated (Quantity 1). 

Link: https://www.homedepot.com/p/Everbilt-1-16-in-x-50-ft-Galvanized-Steel-Uncoated-Wire-Rope-811072/300018981