I'd look for an estate with a good salmon river, as this always seems the element which is the hardest. Highland Perthshire (Atholl, Glen Lyon area) would be one area, central Aberdeenshire (Iinvercauld, Balmoral, Glen Tanar) are others. expect to pay the going rate for a stag, brace of grouse and a day's fishing. the figure mentioned above isn't too far off. Good luck......