We all work on our rides because we like them. I have just spent months redoing wiring that I caught on fire. It mostly took that long because of loose connections in a couple of different plugs. As soon as I get it on the road, I will forget how many hours it took, and say it wasn't that bad. Others can do major restoration on rusted up East coast vehicles, and make it look easy.
Look at how I did my rock sliders, and how PierPaul did his. Then look at your Kicker and figure out how to do the same. Mine was easy to come out looking good, because the body was in good shape. PierPaul had more work to do, to make it look good (and the speed he did it in must have some experience).
You can learn.
The 1.6 will move your Kicker along , and get 20+ mpg (depending how you drive), most get much more.
Keep us informed on how you are doing, and ask for information you need.