We have a manufactured home - built at a factory and trucked to our site in WA state.
Prefab/manufactured/modular homes are a great solution to housing, but many places consider them personal property (like a car) versus real property(like a "stick-built" which is built on site standard home which is considered real property). This makes a difference and may be something to note when it comes to getting traditional financing as getting such homes financed may be a challenge and the dealer may have higher rates plus the fact they may actually depreciate in value over time like personal property usually does like a car.
Fortunately, for us it took a few years for our home in WA state to transfer our manufactured house from personal property to real property so I encourage you to look into this aspect, too, especially if you are planning to resell, etc.
GL!