I have noticed that a lot of sailors would like a set of beach wheels without the large price tag. I was one of them. I purchased a older set supper cheep a year ago. They had golf cart tires. The tires were old so I replaced them with used tires I got for free from a golf cart shop that has to pay to dispose of old ones. The tread was thin but for beach wheels we wont wear out any tires. When replacing the wheels and tires I found that these are very simple. Only a galvanized pipe covered with pvc and golf cart hubs. I can get all the parts for under $40 to make a set. If there is any demand out there I would make and sell sets for $80 plus shipping or could post designs for free if people want. I live in Phoenix and used hubs and wheels are all but free. Only the Tires may be warn, but will not have dry rot.
I know a lot of sailors would have beach wheels if the price were less. I have investigated the construction of the hubs. The hubs are just ATV hubs with flanges to connect to a water/sand rinsing bearing and one tube and one axle. I found tires at www.tiresunlimited.com . The Nankang slick is about $40 each new and light weight.
Do you mean you purchased a set of home-made beach wheels?
Home made beach wheels remain one of the "holy grails" of do-it-yourself. Many designs have been created, and some actually work well in specific conditions, usually they work best on hard ground or paved conditions and where they don't have to be carried long distances, since home made tends to be heavy compared to store bought.
So unless you imagine to create a business off building beach wheels out of used golf cart parts, please post some pictures, parts list, and instructions for your version.