The house I lived in from 1964 to 1975 was next door to a HO brass Train and track importer's house and home-based business.
He had a large HO & HOn3 layout in his lowest floor.
I worked part time for them in the 1960's & 70's.
His wife got the business, he keep the house and layout when they split.
His house is still there, but the layout was removed for new owner.
But I still own my house - next door without a layout (or me).