Examples of commercially viable food forests?

I’m looking for examples of successful food forests that are commercially viable or at least financially sustainable in some capacity. Can anyone help?

Background:

I’m assisting a group of people who recently became landowners and want to start a food forest on their farm (from Kenya, Peru, and Texas). They want to open up their land for local volunteers to participate in the creation of the food forest. None of them have any experience growing a food forest. The ones from Peru and Texas would have to go into debt to start a food forest, which is why I’m specifically looking for ones that generate income. Hoping to interview the people who are involved so we can get as much concrete information as possible.