I think Älvsby houses in the Nordics are closer to what the article is talking about. Their houses are built from large pieces manufactured at a factory and later assembled at the site.
The article is about homes built as essentially a giant camping trailer. The entire home (sometimes in two pieces, as a "double-wide") is delivered to the property and semi-permanently installed, but can still (theoretically) be moved somewhere else after that.
Strange. In the USA, there is a strong distinction between manufactured, multilateral, mobile homes. You can’t use the terms interchangeably. Double and single wides are manufactured homes, but trailer park homes are definitely in the mobile category.