Wis. Stat. § 786.11

No lease, mortgage or sale shall be made until an agreement therefor shall have been entered into by such guardian subject to the approval of the proper court or judge. Upon the confirmation of such agreement by such court or judge the guardian must execute a lease, mortgage or deed as directed by the order of confirmation. The guardian, general or special, may expend usual and customary brokers’ fees, as well as necessary expenditures for abstracting, title insurance, survey, revenue stamps and other necessary costs and expenses in connection with the sale, all subject to review and approval by the court.