The biggest cost of consulting management company is labor cost. Because it sells management plans and training courses, a senior manager who can write effective plans and give suggestions to customers has a lot of annual salary.
The main business cost is the cost generated in the process of information collection, and the cost of investigating the company or industry where the customer is located, including labor cost and some expenses.
Generally, there will be an information base, which will be updated every year.
I don't know much about this industry, so I know so much.