While I am skeptical as well, there are a few other scenarios that aren't being considered in your napkin math:
- Selling items other than crepes: coffee, tea, alcohol, soft drinks, snacks, etc all have great margins.
- If the place is a cafe, customers may stay and work/read and run a tab, increasing the average revenue per customer.
- Multiple customers may arrive as a group and run up a higher tab.
- Multiple locations: compounding revenue, higher reach, etc
There are probably many more things I'm not even considering.
- Selling items other than crepes: coffee, tea, alcohol, soft drinks, snacks, etc all have great margins.
- If the place is a cafe, customers may stay and work/read and run a tab, increasing the average revenue per customer.
- Multiple customers may arrive as a group and run up a higher tab.
- Multiple locations: compounding revenue, higher reach, etc
There are probably many more things I'm not even considering.