Building a new home is broken down into sections. First, the ground is prepared and the foundations are built. Second, the frame and roof of the structure are erected. Then the real time consuming work of walls, flooring, infrastructure, and finishing touches begins.
Or consider the chopping the vegetables and preparing of the broth for a soup happen rather quickly compared to the hours it may need to cook in order to reach the perfect finish.
In a similar vein, putting together your system can take a Saturday afternoon's worth of work.
Tweaking and honing in all the bits and pieces can take a lifetime.