Just happened to see this on realtor.com. It's been for sale for 6 months, so it will take a very particular buyer.
https://www.realtor.com/realestateandhomes-detail/1356-County-Road-SS-1352_Onalaska_WI_54650_M93572-00711
5 bedrooms, 2.5 baths, but 6300sqft of finished space. Another 2000sqft of warehouse / man cave / dream garage, with a loading dock, and another 900sqft workshop / wife's garage.
This was the office / showroom for L R Ross, a custom home builder. You could probably live comfortably in the upstairs and turn the main floor into more garage / museum space.
Certainly not for everyone. Definitely not for me, except the 2000sqft garage space.