It depends... I'm not avoiding the question or being obtuse, but each client's needs are very different.
To be fair, most items are charged on a per-occurrence basis. It is very difficult to quantify everyone's costs under one lump sum as no two client's requirements are the same. I aim to be fair and promise to work until we are both pleased with the result!
First, we need to meet, or at the very least, have a phone conversation to see what your needs and objectives are for your business.
Additionally, I find it very helpful for our personalities to be a good fit and to have the ability to clearly communicate our abstract thoughts and ideas to one another - I want to understand your vision and help others to see it!