Board Thread:Dragon City Gameplay Questions & Answers/@comment-41.41.30.124-20130610014519/@comment-12883520-20130823041946

The best deal is the 48 hour load on the Huge Food Farms, but you need 5k per load. Since food earns you XP, I set up gold earning herds with the higher producing dragons and fed them up (eventually) to L20 or so. The Dark and Ice habitats have higher maximums, so can run all night. Legendary are the best; luckily I got eight before the price got prohibitive ;-).