I need to put fence of 850 meter around my farm. The purpose is to protect plants in the farm from grazing cows. What could be the alternatives other than natural fencing and barbed wire fencing? I want to protect from cows starting now only. Hence not going for natural fencing as it takes 2-3 years for fencing plants to grow and offer protection. Barbed wire fencing is costly (considering running length of 850 meter). Hence I need some cheaper solution that can last for at least 2-3 years and protect farm from grazing cows. Any help is appreciated.