Can you move out of your mother's house in Wisconsin if you are 16 and financially fit?

Not without parental consent. If you leave home without parental consent, then Mom can report you (and I'm sure WILL report you) as a runaway, and you will be picked up by the authorities and returned home. Early emancipation is not even an option in Wisconsin, because that state does not have a statue under which a minor can petition the court for early emancipation.