I maxed my expansion to level 12 when i was castle level 6. At the time it felt like a good anount to have. Now that im castle level 17 with a level 15 tavern i feel like its not enough. I like to feel like even when im away for work i havent lost a whole lot of potential heroes. I would like to increase the tavern expansion to at least 25 because i feel that even with max upgrades that will help me feel like i was able to accomplish as much as possible when away for work.