Wis. Stat. § 786.12

The courts and judges mentioned in this chapter are further empowered and authorized to make any other disposition of the real estate of any minor or other ward mentioned herein when it shall be made to appear to such court or judge that such proposed disposition will substantially promote the interests of any such ward. The court or judge of the court in which the general guardian has been appointed is empowered to authorize the purchase in the name of such ward of any real estate within the state of Wisconsin when it shall be made to appear to such court or judge that such proposed purchase will substantially promote the interests of such ward, provided that no debt shall be incurred or assumed by such ward for purchase of any such real estate. The provisions of this chapter are applicable to all proceedings under this section.