It's been quite a while since I've spent much time in fast-foot places. One thing people here at SF may know about, but I don't, is: are these franchises affected sometimes by diminished wholesale stocks of certain staples (like eggs)?
It's well known that a tremendous amount of food is transported over longish distances. But, for instance, I have no idea about eggs. In my part of the world, the regional poultry industry is swept by a wave of avian flu from time to time, and operations' birds are all then killed by the operators. So I wonder if regional shortages could affect the supply/price aspect of running a ff franchise?
(I'm grateful that in my immediate area we have a lot of home-scale egg production, and friends & neighbors trade with one.