I am working on a single panel screen for a display, 106" x 82" (2692.4mm x 2082.8mm). The highest quality photos I have are 18" x 12" (457.2mm x 304.8mm) at 300ppi.

Of course I don't have to make the Photo the entire board size, but it sure would be more impactful. Would renting out a medium format camera and going to try and get new footage be the best way to go about this? Would that even be large enough or I'd need a Large Format Camera?

Since this is a display backdrop for tradeshows I could get away with doing it at 100ppi so that 18" x 12" would actually be a bit larger. Still a long ways off from the entire backdrop though.

Is it worth it in terms of quality? I mean I could scale up this image and being in an industrial trade show I'm not sure anyone would even notice the quality reduction.

Aside from renting a larger format camera and trying to get new photographs with it are there any other alternatives I might be unaware of? A high end plugin for enlargement perhaps?