I built a surf shower for under 40 dollars, using items found at home depot. Here's the items list:

-HDX 2 Gallon Multi-Purpose Sprayer (link)
-Everbilt Hose Barb 1/4in x 3/8 in (link)
-Everbilt Hex Bushing 1/2 in x 3/8 in (link)
-Everbilt Garden Hose Adapter 3/4 in x 1/2 in (link)
-Any sprayer (link to what i bought)