At this stage Im laying down floor insulation and walls and ceiling.
Anything I need to know now before I mess it up?
We know how to build a tiny home, but never for playing music.

Im routing all kinds of CAT6 and USB networking, led lights, Romex...
I have a nice 12 channel snake with sends and returns and sub mixer/monitor inputs and outs.

This bus will not be moved much it at all.

What key basic am I forgetting transforming this from a metal tube to a wood tube. I will run a single studio grade 18 inch sub. Electronic drums, 50 Inch 4K display, my monitors are 12 inch woofers. (JBL control from the 70's) 36 channel mixer, effects rack, guitar amps, Rhodes piano, my massive modular we hope will mount into the wall with steam punk style water pipes with wood decks, some kind of strap down system or slide out shelving for the keyboards.

Now this should be cool! Looking forward to seeing more.