In the factory environment, the construction process is controlled. There are no expensive subcontractors. Teamwork plays an essential role where employees are efficiently and professionally supervised. Inventory can be controlled and materials can be protected from theft and damage. There isn't much trouble with the weather inside a factory, either.
Purchases are in volume for additional savings which are then passed on to the homebuyer.
Also, because of the size of the manufactured home industry, it can continually introduce new, innovative and cost-saving building techniques which allows the quality, safety and durability of manufactured homes to steadily improve.