I would like to close this topic with the following conclusion:
Looking for a land to shoot just one rabbit in Highlands, there is no common land;most of them are owned by estates like Dunecht Estates, Coolin Hills Estates etc and most of them have agreement with shooting sports agents like Roxton, Dunmhor, Bell Ingram etc. Therefore it has to be done through these agents for the price ranging from £50 to £200 per day (higher price for deer hunting though). Cairngorms National Park helped me enormously to find these estate agents to get permission. Driving 1350 miles, approaching around 30