This is a scale of 1 to 5 to give us an idea of how easy you want this system to go in.
5 is the easiest. A system designed with easier installation will have more pre-assembled components, tools and hardware to assist in installation, and take much less time. Easier installations will have higher cost. But if time or labor is costly to you, the easier installation can pay for itself.
1 is the hardest. It will be cheaper to install but will require more labor and time. Harder installations will require more knowledge of the components and their operation.
Level 5 installation systems will have as close to "Turn Key" systems as possible.