You get 10 guaranteed daily clients, but you work alone.
What would you do if, all of a sudden, you were guaranteed 10 clients every day, five days a week, with two days off, and the chance to take two months off split into two periods? But there’s a catch: it’s a solo business—no employees, just you, meaning you will have to "qualify for the job" or learn everything from scratch if it's something new for you. Your services must be at least acceptable.
If you ever skip a single day or don’t stick to the schedule, you lose all those guaranteed clients. What field or industry would you choose if you had that kind of daily certainty, but it all depended on you never missing a day?
How much revenue will that bring you?
Later edit: the price has to be on the market value, you can't ask absurd money for basic things.
Later edit 2: also, the job/service must be simething real, not invented or exagerated.