Ask HN: Transfer of knowledge industry standard

I'm curious to what the industry standard is for having knowledge and expertise in a specific area of technology that a company has interest in doing, in terms of price and structuring a type of deal.

For example, let's say you specialize in search semantic parsing and a particular startup wants to enter in to an area that could benefit from this. They reach out to you and want to talk about risks, costs, issues, and scope of said project. Since there's no actual work being done other than transfer of knowledge, how can you benefit from offering yourself up to help them answer those questions?