The collection time of the Sugarplum Faerie is 8 hours.
So, we get 2 Undecorated Trees from the Adventure. They become Decorated in 10:Collections, and no others available in Market, except for Gems!!! I?m hoping another Adventure will give more Undecorated Trees, otherwise, this will be Another Unfinished Story. Even if I had enough Gems, I would NOT BUY more in the Market! The trees are Required to Build the Castle and enough SHOULD be Available for PURCHASE WITH COINS!!! COME ON S8! FIX THIS!!!!😡
I don't think you need to buy anymore. It just calls for being in the game more for collections. Have a look at what you need for the upgrades and the math. It's only day 3 so plenty of time to work through the event.
I looked at page one again and goal 5 has moved to goal 6 which makes sense. Recently Storm8 added the side quests to stop people from planning ahead and saving needed parts for the next chapter. That's why it's suggested you don't level up the building because you can no longer collect. With the side quest having you make chocolate turtles, for example, once you do requested amount, it's no longer craft-able.