There is a definite life cycle which plots out the path for many professions and those running businesses. The life cycle is as follows:
5-25 years: you get an education.
25-35 years: you gain experience.
35-55 years: you achieve success (or not).
55-65 years: you live on your reputation or coast along
65+ years: you go backwards.
Farmers running farm businesses fit into this lifecycle of events.