imho, best option is a reuseable panel
we worked for a real estate company for a long time and we suggested we build them reuseable MDO kits & panels on the front-end, and then they simply pay us to remove/re-install as needed with optional regraphic overlays.
(four 4x4's, some bolts, rebar/sandbags, and a 4x4 or 4x8 primed&painted MDO, just one kit saw maybe 30 installations on its own over a decade and only a couple of regraphics)
golf outings, we still use coroplast because the stakes are stupid cheap&simple BUT we request they collect and repackage everything immediately after the event and we store & regraphic for them every year.
we still regraphic church event banners that we originally made in the 90's and just have to peel&stick new dates on the bottom because they're only up for a month on a fence and then neatly stored.
however, what to do with all this plastic? I'm all for giving it to
this guy