I found that i could buy a basic gamo target and put a quality targets gamo predrilled faceplate on them for less than $45.00 total for each target https://www.qualitytargets.com/gamo-face-plates/I have elevated wooden boxes about 5' off the ground with Paul Porchs resettable rectangular targets in them. 55,50,45,40,30&20 yds. No strings involved and don't have to move anything when cutting the lawn. I shoot from under a gazebo which makes for a comfortable setup.
That's a nice setup you have there Rudy!