You keep your dog well fed exercised and in good condition but you cant get out to work the dog as often as you like because of family work and that your limited by not driving and that the area you live in doesn't hold that much game.
Taking that into account would you still expect the lurcher you have tp still put a good heaf of game in the bag and try his heart out when the opportunity arose.
Im a great believer in - you cant make a dog good
A good dog is born
You can ruin a good dog
Plenty of work