I picked up nine masonry ladders today (https://www.homedepot.com/p/Grip-Rite-8-in-Ladder-Mesh-Block-GRLBMG08/203590053), which look kind of like this when set up as hoops:
https://www.pinterest.com/pin/281756520422309513/
The ladders were cheaper than PVC pipe plus the requisite affixing...
