I'm a newbie, with a family of four. We have excellent credit, a middle class income, and currently travel domestic once a year. We'd love to travel more, and internationally. If we start credit card churning, what's a realistic annual goal for us? Should we save all of our miles until I can get 4 award tickets, or should we set our goal on two and purchase the other two? I'm not interested in gaining elite status, since we need to sit with our young children.