My wife and I built a travel trailer. We needed to judge our water usage to decide capacity.

My wife has long hair, all the way to the top of her butt. Without rushing it takes her 10gal (~40L) of water to have a shower where she washes her hair. At the other extreme, either of us can take a basic shower where we turn the water off until needed, a “navy shower”, with 2gal (~8L).

In the US all shower heads are limited to a maximum of 1.75 gal/min (~7L). It’d take about a half hour to use 200L+.

The first thing you could do is to heavily shorten the time the water is running. One or two minutes split between start and finish is sufficient. If even more severe limitations are wanted then install a bidet or kitchen faucet sprayer instead of a shower head.

Much is pointless, without meaningful effect. Go after the corporations polluting, using, and often stealing the vast majority of our water. And, move out of Phoenix and Las Vegas.

If you’re building a world it’s #1. If you’re telling a story then it’s #2 with presence activation. If you’re Asimov then all of these are wrong.

My Vicorinox was a daily carry for ten years. I only gave it up because my wife needed a pack and I wanted a new feature. She’s carried it for another couple years. The pack is made better than my Osprey hiking pack and the 5.11 that replaced it.

What’s proprietary on a bike trailer?

I’m new to trailers, own a 14’ enclosed tandem. The only thing that’s kinda fucked is the quad-square screw drive on the self-drilling screws from floor panel to frame.

For BIFL you want a full metal cage & blades typically marketed to warehouses. A brushless motor will further extend the life. Buy them used.

A more effective way is a ceiling fan. Hunter isn’t a high end brand. But, if without a remote and excessive dust it’ll last at least a couple decades.