very difficult to answer price per acre issue, we pay £40.00 an acre for grazing and we also take hay off it. it will depend on what part of the country your in, demand for grazing in your area, one problem in our area is a few wealthy horsey people can pay almost any amount which a smallholder cannot compete with. we rent 4 acres which is now good grazing but when we took it on it was full of docks old grass etc since the sheep have been on it and a few hay cuts its come back really well. good luck neil