Modular Homes are not a new idea.
Technically speaking a modular home is comprised of sections or Modules that a built in a controlled environment and then transported to a job site.
One of the significant advantages is that work at the home site and construction of the home can be done at the same time. Obviously, if you are considering a commercial building with multiple rental units this is a huge advantage as you project will be completed quicker and most assuredly on time.