People are selling business plan creation services for $5 on fiverr.com,you are proposing a price of 100+ USD.
I don`t know what factors determine the cost of a good business plan.By the way,what is "ICO brokerage"?
Do you mean companies that organize ICO projects for their clients and charge them a fee?
What I understood to what he is saying is that how much would you pay for a well detailed ICO project. He probably is creating ICO plan, including the whitepaper and all he is offering is the buying can get funds through it. He says "ICO brokerage" some people may interpret as "ICO scam" which means he only have the idea. No team but only an ICO plan.