the guy you have linked to, is no farmer.
his price calculation is wrong.
when i needed a hay-baler, i bought one for the small bales.
when moving big round bales one needs a tractor with frontloader, a big trailer and an expensive driver.
for moving small bales you need a wheelbarrow driven by a halfwit, or a wife, a cheap farmhand and a pickup truck.
in the dry seasons we were feeding about 900 head of cattle with hay.
the difference between theory and reality…