It is so clearly the way forward when it comes to house design.

Don't let go of that goal!

First, I'm going invest into one or more of the promising co-living projects popping up now, maybe spend some weeks onsite and get to know how it works, how it feeld. Later, skilled up and with experience, I might actually start one myself.
Tiny house is a cool concept but too small, Fresco's sustainable cities are just amazing but too big. Seems earthships are the right size and the thing to explore now ...