I know this is an old post- but on the off chance the poster is around- In Wi- children never have the controlling voice for saying where they live. In contested custody matters a GAL (an attorney that represents the best interests of the child)is appointed, the GAL will convey to the court what the child's preference is AND what they have determined to be in the child's best interests. So the GAL could say "Your Honor, Bobby Sue has expressed to me a deep desire to reside with her father because she enjoys the freedoms she has at his home, however my investigation has led me to believe that it would be in the child's best interests to live with the mother as there is more supervision and structure for the child in the mother's home."
Occasionally at 14 and older the child can speak directly to the judge. But again- the child's preference is not in any way binding.
The most decisive actions of our life ... are most often unconsidered actions.