No, there’s someone out there reminding you it’s not intelligence, because it’s not. Astonishing results are great, let’s celebrate them without claiming they’re something they are not.
If you’re selling your time, you’re a salaried employee. The project fee will, in the end, also just account for the time you need to finish the project + some safety buffer. You’re basically just being both your boss, who would usually transform a client payment to savings and your salary, and you the employee.