I havent met a farmer who owns his own working tractor at this scale. They are almost universally owned by the farmer's business entity. Any farmer operating as a sole propietor, and is in the market for a $500k tractor, needs legal advice asap. These are industrial machines, not household appliances.
Wait, maybe Jeremy Clarkson bought that lambo tractor under his own name. But it is more likely that his production company owns it.