What do you quarantine them for? All I ever do with new ones is worm them. (Not like chickens, of course, the numbers of diseases they can bring!)
Do you have a large area for them? I´ve only ever bought 4 adults, and they never did try to fly away. It´s safe here, no dangers at all if they stay in the chácara (homestead), they have two acres that they share with chickens, geese, they have food, water, bushes, grass and mud, so they´re happy. And I´ve only bought them from a good distance away so they have no idea where they´d want to go anyway!