Board Thread:Game Discussion/@comment-24.18.57.164-20130628041950/@comment-4199297-20140808164022

193.187.235.17 wrote: Best way to get money apart from Monster Nests are Cathedrals (if you are very active) or Taverns (if you can login once every ~4h)

Cathedral has hidden upgrade it only states maxes at 600 - but it also produces 600/h after upgrade instead of just 500 Nothing hidden about it. every building keeps its "time to max" (about) the same when upgraded, therefor increasing the gold per minute rate. Bottom line as far as I remember: level 3 Nests about 20% better than level 3 training fields if you sleep short and/or can collect all trough the day in intervals shorter than 4 hours, but costs more than twice the gems to upgrade to level 3.