And your yield will probably be lower. You might not get all the seeds planted before it's time to harvest, but a huge crew could help. Most farmers use tractors and other machinery, which also means they use diesel fuel and oil, both of which can pollute the air and soil. A real family farm. If you hire people only when they're needed, you will probably make the most money.
Many farmers use pesticides.
But they can hurt animals and plants in the air and water. Use the pesticides only according to the label. You would need many, many people to take care of an insect infestation or disease. Still, many farmers grow their crops organically, without the use of pesticides. If you're growing organic crops, make sure you're only using manure to fertilize.