That's implying that automation costs that much every year, or that you must get an ROI of 100%. Almost in all cases, automation has a high setup cost but a low maintenance cost.
No no. What I meant was that, the automation usually costs around 15x-20x annual salaries of the workers, one time cost maintenance comes after . So unless you get MORE THAN 20x - 30x yield per year, no one is gonna care about automating the process.