Here's a fifteen year old beast that's still going strong.

6mm Luan ply, 3/4" aluminum angle, "pop" rivets and backing plates, cheap drawer pull for a handle. I had to buy the drawer pull, everything else was on-hand scrap.

No paint, just the raw materials. Too many fuel and acid spills to count, no rot, still just as lumpy and stout as the day I built it.

Garden tractor battery goes in the lower right compartment, below the power panel. Fuel jug goes in the bottom left compartment below the fuel pump. Doesn't "look sharp", but then it doesn't have to fly or look good, it just has to work.