Building your house with a prefab system (be it pre-cut, elements or modules), will require that you do a certain amount of work on your site before the construction of the structure starts and after the construction ends.
In fact, most manufacturers are just suppliers and they limit the scope of their work to the assembly of the house shell (building envelope).
But you have to build the entire thing... so how do you deal with the rest?
You need to hire a general contractor, or a series of local companies to carry on the works for you.
Here are the important aspects you should take into consideration...