My wife has a two day show coming up in two weeks. She has to hang 80 16x20 full bleed prints on Friday and break it down on Monday. I'm wondering if there are any quick and dirty methods this can be achieved without making any significant material purchases. The images are 16x20 full bleed without any matting or backing material, just the prints.
I don't wish to sound negative but you guys are in for a lot of work, if you are not experienced at hanging shows.
First you don't mention how much wall space you have to hang photos in but I assume it must be fairly substantial since you mentioned 80 - 16x20 prints.
As for framing, what John said, frameless hanging kits are about as cheap as it gets but allows you to display full bleed prints.
Borderless prints are a PITA and will need to be attached to a support. Going forward I would not produce borderless prints since they don't handle well and are difficult to display.
I would suggest having a center line of about 58 to 62 inches from the floor to measure off of. Since all of the prints are the same size you will probably wish to avoid clustering.
Also if you only have two days display time, is this really going to be worth the effort?
Since you sound inexperienced, two people hanging 80 prints is going to take you a lot of time. Be prepared to work a long day, don't obsess over perfect arrangement (unless someone else is curating) have all of the tools and hanger parts there ready to go, water, caffeine and a lot of patience.
Just some thoughts.