Well that is a hard question to answer, I can only reply from my experience. First of all it is not cheap, the project I am in we funded it by a subsidised project. And some farmers continued the coaching on their own cost, but most of the time the farmer sees the value in a broader perspective and it does not focus on a certain subject but is used as a tool for multiple issues. Hereby the coaches are most of the time payed by the hour.
What we also see is that certain concepts in the pig production as a group hire a coach or make it obligatory to have a certain trajectory with a coach most of the time those examples the farmers pay one amount and get a certain amount of coaching sessions. We never did economic research to see what the economic benefits at the end are.