Design of Stalls

As I mentioned in the previous post, the design of the stalls needs to allow them to be folded and kept in storage when not in use, therefore designing/purchasing stalls that are flexible and space-saving, however still structurally capable to cater for external forces that could act on them.

This led me to do further research into the design of my stalls. How big should they be? What materials should they be made of? How user-friendly should they be for users? How strong do they need to be?
Below are a few examples of the stalls that I was most interested in, together with my decisions for simple stalls that would cater to their needs.