This section is about installing the plumbing and electrical. This pic shows the installation of the graywater output line. Closest to back wall is the outlet for the shower; in front is the outlet for the sink. Note the box with three knobs to the left; that is the propane fired water heater.
This shows the cleanwater inlets for sink (hot and cold on left and right respectively) and the outlet for the toilet bidet at front.
This is the pipes for the 12vdc water pump and the hot water heater. From left: pump input; pump output; water heater input; water heater output. There will be an external T for a shower handle. The black tape is "Gorilla Tape" which was the only way I could get the pipes to stay in one place.
Now for the electrical. This is the main electrical wiring before my uncle stepped in and said "hey, wait a minute!". Fortunately I didn't fry myself to a crisp with this rat nest.
Free advice: do NOT run wires on the OUTSIDE of studs with romex staples holding them in place.
"That's what drills are for, dummy!"