Mich. Comp. Laws § 125.771

Sec. 1. As used in this act: (a) "Mobile home" means a factory assembled portable structure designed or used for year-round residence purposes, designed and built to be towed on its own chassis, connected to utilities, and installed on a homesite with or without a permanent foundation. A structure may contain parts that may be folded, collapsed, or telescoped when being towed, and expanded later to provide additional cubic capacity. A structure may also be 2 or more separately towable components designed to be joined into 1 integral structure capable of being again separated into components for repeated towing. (b) "Motor home" means an automotive vehicle built on a truck or bus chassis and equipped as a self-contained traveling home. (c) "Recreational vehicle" means a transportable structure which is used for camping or casual travel.