A mobile home and homes using those same off-site building practices are a depreciating asset that requires different financing, etc.

On the other hand, a modular home, built off-site, but using the same techniques as a standard home: wood studs, drywall, standard plumbing practices, etc, then brought onsite is in some ways better than a home built onsite. It can be financed in the same way, and it is not a depreciating asset. The link to a house in the OP appears to be a link to a module home, not a mobile home or its ilk.

Currently, some very high end, large houses are modular homes. The one in the OP is a very simple, small modular home. Every 5 years or so that goes by the modular homes get nicer and nicer and better built.