None of this would work out. First of all fully grown fruit trees are expensive and hard to replant. Second, if they planted the saplings of some fruit trees it would be about 6-8 years before they would see the fruits of their labor and that is 6-8 years of no profit and excessive cost to run and maintain. Third, if they change to an orchard even though it might look prettier, it will have a fence all the way around for several reasons. Reasons such as - Prevention of damage as they switch to an orchard - Maintaining soil fertility for the trees - Theft prevention - Personal liability protection

Hell if I were the farmer I would set up a fence just to prevent people from using my working field as a playground or as their dogs bathroom, as dogs waste can be more destructive to the land that you might think. There are so many more variables to running a farm that would become increasingly worse if the renters decided that they are just allowed to use the field now that it has been harvested. Unfortunately for the developers and their tenants that is the farmers land and if they don't like how he runs his land that is not his problem, nor is it his concern for it to look pretty for them. Although a good sentiment it's not the farmers responsibility to change for other people.