I did a ballon arch for my Son and daughter-in-law gender reveal. I made it out of pvc and stuck it in the ground,tied the top of the arch to the house with mono fishing line.
It was less than $10 that was over a year ago. I may still have the pipe if you want it.

Change from boxes to helium filled balloons.

I can tell you with 100% certainty that I don’t miss stupid grade school stuff like this, I did my time and now I’m a free man

I know a thing or two about Rebar

It’s clearly a dangerous hazard that should require waivers and consent forms to walk near or under.
No need to trick up Christmas with a present arbor. Put down and walk away from the bedazzler, donate to the canned food drive, and sing Christmas songs loud and clear for all to hear.

it can be done, of that I have no doubt. gonna end up lookin like an elton john concert tho.

If they didn't give you a set size to make it...make one that will fit in your hand, using jewelry boxes and then tell them....nobody said what size.

Sure, likely story.

I appreciate the kind offer ! Yeah if it was balloons - this would be much easier. Or with not “arc”. I’ll give it a try with leftover materials from the garage / shop.

Just tape some boxes together.
How hard could this be?
It will be more work just wrapping the boxes.

Just get schedule 40 bell coupling PVC. (2) 10’ foot pieces. The bell coupling is built in, glue the 2 pieces together. It makes an arch. Everyone in my neighborhood does it including me. We arch the PVC over the sidewalk and attach lights for Christmas. Don’t get schedule 80, it won’t bend as well. Schedule 40 is perfect for the bend. Cement rebar in a big can or bucket and place the PVC over the rebar. Thank me later. Once the cement dries it’s about a 10 minute job. The arch is about 7 1/2-8 ft tall.

Use conduit for the frame and cut holes in the boxes and thread them on.

Conduits not a bad plan either.

Make sure you hang a Merry Christmas sign on it, that way you will offend everyone & wont get asked to do any more Christmas deco projects.