So I finished my range cart. It started last fall. I found a cart on Facebook Market place (Who says Facebook is all bad). for $20. I snag it and put it down in the basement. over the winter, I stripped it down and decided how I wanted to lay it out. Since I still like and shoot my powder burners, I had to design it to be dual purpose.
I bought a piece of green painted steel channel and hacked it off so it would fit between the wheels when I pull the two front pins and fold it down.
Took some PVC end caps and carriage bolts and attached them to align with the two ATV rifle racks that I bought ($20) and attached to the handles.
I can fit my air tank first and then my range bag on top of that.
Total spend (including the cart) $50.