Zip ties... zipping shorter ones together they become any length needed.
Paddle wire ... even the cheap stuff from the dollar tree comes in handy.
Office clips... cheap, come in many sizes and can clip things to things
First time we learned about office clips we were doing a small haunt scene with others for our group's party. Everyone had a pop up canopy and we were told if we get black plastic we can make walls for our canopy by hanging it with office clips to the bars of the canopy. Once we learned that OFFICE CLIPS found millions of uses.
Cup Hooks... screwed into wood or whatever when used with office clips can hang just about anything by flipping over just one of the clips handles and hooking onto the hook.
Clamp Tite tool...
https://clamptitetools.com/ so many years ago I don't recall Frog purchased a couple of these at the fair. Best dang tool to turn wire into a clamp. As a auto mechanic you can imagine the uses but here at home it made clamps to hold PVC pipe to T-posts, worked so much better then zip ties or rope.
Watch for coupons... Harbor Freight always has a 20% off.... close to holidays there are weekend only 25% and this weekend a 30%. Canvas drop cloths, inexpensive paint sprayers,Paint brushes, packing tape, zip ties, gorilla glue. When we out grew a 10x10 canopy we moved into one of their 20x10 portal buildings. We've found their tools aren't always that great for longevity but they have so many other things a haunter can make use of.