Yes - once I unlocked that piece Mickey popped up saying he wondered if this would be where Minnie will be and he was off on two rather long quests before I got the quest to welcome her. It also unlocked a building quest for another pretzel stand, churro stand, and two enchanted bouquets.
The first piece of Fantasyland is 70,000 magic but only takes 1min to clear
Mickey's 2 quests prior to Minnie were one with Daisy (I want to say it was 8hrs) and the second was "serenade Minnie" for 16hrs.
Then you will get "Welcome a Sweetheart" quest which will unlock the Minnie Mouse tokens to welcome her
To welcome Minnie you need 10 Pink Bow Tokens and 10 Minnie Ear Hats, 30,000 magic, but its only 4hrs once you have it all.
I already have her at Level 2 which is what you need to unlock her house. Her house cost 25,000 magic. I currently have it being built and will have it in a few hours time.