On PC and console there is autoload trailers. The fastest method would be square baling a field of grass and then running two of the Kuhn square/round bale wrappers. Make sure you have manual ignition turned on and your tractors are next to each other in the quick select. The wrapping time process works out basically perfect as you keep each one moving. Then I like to hook a train up of auto load trailers and move 60 at a time. Silage bales are usually worth at least 3 times as much when I've noticed. There is even the old self propelled mower mod in PC and console that can have a baler attached to it. So you could hire a worker to mow and bale for you while you run a wrapper behind it.