I'd just say to each neighbor, "Hey, how 'bout you give me one cow per year to butcher/freeze/cook, and you can graze the rest for free?" 260 acres ... man, that's a mess-o-fence to have to build. Maybe I'm just too lazy to build that much fence, but unless those cows were coming and jumping into my swimming pool, I'd just let them be. It would be different if you needed the land for grazing your own cattle, but that doesn't sound like the case here.