the self propelled robotic unit was just a demo, the actual implement requires a CAT3 3 point. it has an option for generator or PTO power (I'm assuming the "generator" option means it has a small diesel engine to power the actual generator vs just getting power to spin the genny from the PTO.) thats going to increase fuel cost depending on what the electrical load is... and their produce spec sheet says 2ac/hr @ 1mph compared to covering say 40acres/hr with a conventional rig (I know that 40acres/hr is just me pulling numbers from thin air and will vary based on a number of factors)