I personally could not live without my tractors at this time but I have over 300 acres. Yes, they are smelly, noisy and dangerous and I would love to eventually replace them with horses and oxen but it will take time and also, it is difficult and time-consuming to do heavy draft work like plowing with animals. You can plow an acre a day with a team of horses and a bit less with oxen. I have considered phasing in draft animals for jobs that do not need as much power such as haying, seeding and cultivating and keeping the tractors for plowing and disking.