I know the majority owner of a pretty massive fast food chain (600 stores, most franchises) and he was telling me he was offered 10M to sell the company. His entire life he worked day and night, and he would be getting $3M. (Mind you, he owns dozens of franchises, so he still keeps those)
He brought his kid into the business, and I can tell he has a bit of envy that I own a small software company that within a few years is approaching 1M in revenue. There is less glamor and margins in food.
I have some ideas of using my math/engineering skills to make low cost recipes that taste good, using my masters in Industrial Engineering to lower cooking/labor costs, but... economics pushes me towards high value. Any time I do the math on food service, I see myself making 100k/yr, and never 1M/yr.