I would venture to guess that there isn’t too much of a difference between the lifespan of a standard new ranch home compared to a new manufactured home. It’s all up to the care and upkeep of the owner.

No. Manufactured Homes are real estate in NH. In MA, they are more like a car or other good that is transferred via Bill of Sale and not a Deed.

It is considered a depreciation asset because often they reside in a park and owners do not own the land they sit on, meaning the value of the home only goes down while the value of the land may rise with the homeowner seeing no benefit.

If the land is deeded along with the home there is no reason to think of it as something that will depreciate.