You have a bad case of coveting what your neighbor has. Managing acreage is a complex job and is not deeded over when a person buys a place. They will learn, if they choose. Hopefully, you'll learn to be a little more open-minded about new people and learn to pursue those opportunities that come. Ask now about the second mowing, volunteer to help or harvest the hay and teach the owners about their property. They in all likelihood will be happy to learn; and everyone benefits.