I could set one up for you for free if you give me a plot, my town fell recently and I need a place to live.
Issue with this is cows are a passive mob and thus in order for you to kill them you would need to be a resident on a town owned plot otherwise the destroy tag needs to be on and I for one will not allow that on my plots for outsiders. For that reason I'm out.
~ @LordGalaxy
You can just set up a auto-grinder, many food pwarps have done it before