I recently made something very similar just out of wood. I called a local ski shop and they said I could have an old pair for free. I little spray paint and they were good as new

I used downhill skies... A resale shop or Goodwill would be a good place to start. Ask friends- a lot of people have them laying around.

What material did you use for your frame?

Posco- I used Bosch Rex Roth, It's an extruded aluminum product that has unlimited fastener options, extremely light weight and strong. It's an Erector Set for adults, I had a bunch I bought at an auction, it's expensive new but you could use wood or aluminum channel from a junk yard as a substitution.

Yesterday made a beach cart for the cabin- I'm about out of the extrusion material but it's awesome to work with. It's used in manufacturing - for machine guards, workstations and enclosures if you can find it, it's sweet.

I have welded a couple together that I made from metal conduit. Just have to smash the ends with a hammer to weld them to the side of another piece of pipe. Very inexpensive and light.

and you can cut aluminum with a chop saw! Cuts like wood.

Spot on Gary... I prefer a 60-80 tooth blade, if you're cutting a lot of aluminum, I like to wax the blade to prevent build-up.

and safety goggles....:)