I suspect they are a bit high, but not insanely so. The author is using city limits rather than metro area it appears, so there is going to be some draw in from the suburbs.
100k/305 residents= 325 people/restaurant. Average per capita spending on food away from home is $4500. That means that each restaurant has $1,475,000 of addressable market on average, which seems totally viable? (https://www.michiganfarmnews.com/boom-in-spending-at-restaur...)
100k/305 residents= 325 people/restaurant. Average per capita spending on food away from home is $4500. That means that each restaurant has $1,475,000 of addressable market on average, which seems totally viable? (https://www.michiganfarmnews.com/boom-in-spending-at-restaur...)