It seems today the importance of these cheap props lies in being a noticeable group. Instead of purchasing t-shirts, plastic junk, or tank tops, I suggested making fabric accessories. I have an immense amount of broadcloth scraps at my disposal so the total cost was my time and $11.29 (for the elastic, metal clips, and metal broach pins from the craft store). The colors of the wedding are grey and yellow so it was easy to just go with that.
Here are a few tutorials I referenced while making these:
simple fabric flower tutorial
DIY Braided Felt Cuff tutorial
Fabric flower earings <didn't have posts in the house :(
pom pom necklace tutorial
Fabric Flower Earing Tutorial 2