Why does board cost so much when they are eating grass?

Grass isn’t free. It takes maintenance, mowing and spraying. That costs money in diesel, oil, hydraulic fluid, filters, grease, repairs, sprays, etc. To keep equipment running and pastures maintained is expensive. I spent 5 hours mowing today. Jaedon spent two hours working on equipment and another two hours mowing. That was only three of our 11 pastures/pens. Just in labor, that’s $720. I spent $200 on diesel. We used oil, hydraulic fluid, grease all that have to be replaced. I also broke the PTO output shaft on the tractor. We have a spare but now that spare has to be replaced. The tractor has an oil leak. The shredder has a U joint that isn’t happy. The grass your animals eat means we aren’t feeding it to ours. That costs money. Grass isn’t free. We may not “buy” it, but it still costs us $$$.