I have spent the last month reading through the entire thread, taken notes, and made a book list. Thanks everyone.
My two coins - at first the OP’s question seemed brash, but now I appreciate his directness.
As others have pointed out, farm income streams are low margin and need to appropriately scale (niche on one side or high volume on the other, tougher in the middle) to find the profit. Diego’s question was quite focused on selling products grown (or raised) on farm land. Fine place to start a business plan. I sure am glad there are people out there who are passionate about growing stuff.
Boosting a farm business plan with permaculture (and other) design strategies can help to make it resilient and the scale issues become less persistent.
A few notes, some have been said before:
Diversify the products that will leave the farm to customers: Animals and meat, eggs, dairy, fruit, vegetables, mushrooms, honey, firewood, seeds, starts, cuttings, canes, etc.
With a little extra processing: jams, jellies, cheese, pickles, wood chips, mulch, compost, wool, felt, etc.
With customers onsite: tours, day camps, school groups, you-pick setups, classes, etc.
Farm knowledge as a yield: Shed building, tractor repair, tool maintenance, land surveying, sheering services, mobile slaughter, horse shoeing, livestock guardian dog training, solar power installations, pump repair, etc.
These are just a few ideas that tie directly to farm and land use, there are many many more.
The keys to getting the right group of yields set up, and minimizing time and cash inputs, and finding a market for one’s products is hard work and it takes patience and adaptability. What worked 5 years ago may not work today. With a highly diverse system the farmer can hopefully guard against market fluctuations by maintaining the elements that work, and updating only the underperforming parts of the system. All of this assumes one has land, and time to devote to setting up or learning to optimize the farm systems. If one does not, that is another hurdle to jump. Setting up farm systems, marketing, and building community (It cannot be stressed enough that good relationships with the community can make or break any business starting out) are almost three separate skills.
Farmers can earn a profit. Permaculture designs can be used by farmers that earn a profit. I appreciate the spirit of this thread because it highlights examples for people who want to earn a living, and use permaculture, and do not want to write or teach design courses for a living.