I haven't posted here in a while, but I have managed to finish and send out my invitations!
I ordered the design on Etsy, and then printed them at a UPS business center, and assigned two bridesmaids (well, one is a groomsgirl - on my FH's side) to cut and assemble them. I can't remember where I read the tips to assemble them, but it was fairly easy. I bought waxed twine to tie them together.
As for the envelopes, stole this idea from Etsy as well, but made them myself - I collected city maps from fellow cabin crew (FYI for those who don't know me, which probably most of you! I'm an international flight attendant living in Dubai) and just whipped them up. Although I wish I had heard of stationary glue because I used gluestick and that got messy!!!
I can't tell you how many maps and from where they're from... literally all over the world.