Another cheap target holder
Scrap CPVC from a worksite, some binder clips, and some aluminum barstock I had laying around. Knocks down for transport, and holds 8 1/2 x 11 sheets. The bottom spreader is a rip of 3/32 plywood.
I also make my own shoot-n-see targets. Astrobrights cardstock from Walmart, covered in clear plastic packing tape, then sprayed with flat black paint, the cheaper the better. "Project" spraypaint is cheapest and best for this application.