Which plug in you are going to install. First clarify it and then I will explain the solution to you.

I agreed that if you are not an architect so do not design it because it's an essential part of home construction. You can give the idea of your planning. In your situation better to consult with the company or hire a contractor he will do all necessary things.

You cannot make home beautiful until your home construction is not good so first plan about interior decoration and after that exterior. Its totally my opinion.