Many thanks for all your suggestions - all were very helpful. We were looking at the machine that Patf I think suggested [ débroussailleuse sur roue, I think is right ] which is like a very sturdy strimmer on three wheels. We saw one on Bon Coin and spoke with the seller who, despite losing a sale, said it would not be suitable for the amount of land here. He suggested a small tractor which we are now looking for. Sheep not possible because of dogs and local farmer, I take the point, but we would just prefer to do it ourselves - for now ! Thanks again for your advice.