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.
I use H-Stakes from campaign signs after an election. Tape a target to the sign and shoot until it is shot up, then replace with a piece of corrugated card board. I usually ask the candidate and they are always glad to have help removing these signs after the election is over.