Just want more bass for Bose

DR_

So let me know if my plan would work okay. I want to keep it simple and just replace my bose woofers in the hatch with a box. I want to use a single 10" and a mono sub amp.
The amp and woofer would be under the hatch carpet with no spare tire.
I would use the existing bose woofer connections to go into the amp for speakers and turn on but would run a power wire and ground to something in the hatch.
I want to make it super easy to remove for track days.
I would prefer to fire the woofer down so that it wouldn't be visible but would consider firing up if it will make much difference.
I like this setup below and would maybe only change the woofer to face down and I would prefer the amp towards the front so I wouldn't have to lengthen the speaker level wires and turn on wire. Maybe add some handles to the side as well.
Does anyone offer boxes like this already or would I need to go local custom?