How can we build a surf ready cart out of PVC pipe

The other day we saw someone at Edisto Island with a cart for surf fishing made completely out of PVC pipe and some wheels. I thought it was awesome and since the ones we currently have are the $100 garden carts from Tractor Supply we dont expect them to last long. We already see rust and a wheel busted and thats only after 1 day at the beach. I think I get the concept of the top frame, but the wheels is what is throwing me. Can anyone help?

These will be used with the kids going on trips fishing/camping with SC Fellowship of Christian Athletes Outdoors.

Is it any wonder Jesus choose Fisherman for his disciples?
www.SCFCAOutdoors.com

Check out these guys.
They have a kit with wheels and an axle.
http://www.wheeleez.com/

…ask and you shall recieve LOL

“Fish On”