Instant target holders. Crude, but effective. Everything was just taking up space at my place. The only thing I had to pay for was the electricity for the power tools.
Detail of one front and back.
Front and back of one taken down for storage and transport.
I keep some heavy parts of old tractor implements handy to anchor them down on windy days.
For cheapo targets I talked to the woman at my job that goes around and updates all the bulletin boards. She pulls down the old ads and dumps them in the trash. I got her to save me a big stack of them about 18" high of 8.5"x11" and 11"x17" paper. I printed some targets from a website and went to Office Depot. They printed me a BUNCH of targets on my paper for 0.5 cents each. I pay about as much for the staples to put the targets up as I do for the targets.
Some things in life are almost free.