It took a total of 10 days to complete. The only reason it took so long, was for waiting the paint on the amp rack to dry. Without a paint booth, you have to wait a full day for the paint to cure. That is actually Ford OEM black, just like the outside of my car. We did the primer, base coat, clear coat. With the JL 10W7 sub, you only need one. It's being pushed by a 500 watt JL amp as seen in the picture. Trust me, it kicks! Total cost was about $3,000..