This is all true, but have you priced haying equipment for a 4 wheel tractor?
When I did my classes on sheep farming, I showed where a 2 wheel tractor was $9,0000 for new haying equipment, and using a dealers haymaker bundle deal, it was $27,000 for new haying equipment for the 4 wheel tractor. Sure you can buy used haying equipment, but that is not comparing apples to apples.
At a fair a dealership had a USED baler and were proud of its cheap $14,000 price tag! That is a steal, the same thing new was $44,000.
I break everything down by lamb costs, so assuming a $100 profit per lamb, I would have to raise 90 lambs to pay for the 2 wheel tractor haying equipment, and 270 lambs for the 4 wheel tractor before even beginning to make a profit. That is a lot of extra lambs for getting the exact same thing: hay.
To make it easier though, I would buy a sulky and save myself a lot of walking. That is always the limiting factor with my BSC; it actually accomplishes a lot of work, I just get tired from all the walking. But a sulky is cheaper than buying 4 wheel haying equipment.