Solved
Console - missing household and household items
Has anyone else spent time making sims, building up their skills and fully decorating a home only for the sims and all house decorations to vanish later, the house shell and landscaping still there (...
It sounds like you may be seeing some "culling" in your game- culling is the removal of households from the game for performance-management and game stability.
You can read up a bit more on how this works in-game in the post here.
