What are reasonable prices you would pay for your dog to be walked for about 30-45 minutes? Thanks!!!?

They should all be the same price. I'd pay $2.00 every 15 minutes. But how would I know? I take my dog for a walk every single day, for at least 45 minutes. I don't need somebody to walk my dog. And, I think you have to be 18 to legally start an actual business.