Not sure where my receipt is from the first trip to the steel yard. That bill was just over $500. The second trip, I needed another 10ft of 14gauge 2"x2" tubing. Price was $94.53 per 20ft. Most of my outer perimeter framing is heavier than that - 1/8" wall or 11gauge? In total, I have roughly $1100 in steel. The market has been high. It wasn't really the best time to do this, price-wise. In addition, I bought some small tie-down thingies. I already had the hinges for the fuel tank hatch. It required a new, longer fuel filler hose. About $75 for the Rustoleum paint. New bolts for mounting it to the truck - not necessary. But it seemed like a good time to freshen up that hardware. The project will almost entirely destroy a 11lb roll of MIG wire, though a better welder would probably use less. Most of a tank of gas (argon/CO2 mix). I've used up one good quality portaband blade, five or six 4 1/2" cutoff wheels, three or four 4 1/2" grinding wheels, a handful of 2" rol-loc wheels (like Scotch-brite pads) for cleanup. What else??
I could have skinned it with 18gauge instead of 16. But I have issues welding thin stuff. Plus, I want it to be tough. A 4ft X 8ft sheet of 16gauge was $173 when I bought. The expanded metal was $153 for a sheet. I don't have much sheet material left. I had to plan "cut sheets" to make the most of the metal and get it all out of 3 sheets. I stuck to those plans and it worked. But that is why the expanded metal side panels have a seam at the middle upright.
Overall, this is almost twice what I wanted it to cost.