I just bought an old house was built in 1927. I'm only visiting the house until I retire. I don't find the "old" smell offensive but I find my clothes have that smell. The house has no mold per the inspector. It has a bilge pump to remove any water under the house. I'm going to clean the walls and paint before I move in. Probably will refinish the original wood flooring upstairs also. When I'm not there, I leave all the cabinets and closets open and that has helped some. Any other suggestions?