If you own property in more than one place, you must register to vote using your primary residence.
Simply owning a business or temporarily visiting in a city, village or town does not qualify you for voting there if you intend to permanently live somewhere else. Your voting residence is defined as the place where you live, without any present intent to move, and where you intend to return when you are away.
For more information about Wisconsin's standards for voting residence, you can consult Wis. Stat. s. 6.10.