taking a step away from 100% DIY, it might be worth exploring mobile homes as an alternative housing option for walkaway communities. they have a market outside of our niche, but also fit many of the unique requirements that we have. there are some challenges (at least historically) with insulation, but that shouldn't be too difficult to fix aftermarket. the renewability of the manufacturing process depends on the manufacturer, but it may be possible to start a cooperative to do this ourselves at some point in the future.
mobile homes are attractive because they can be installed without a permanent foundation, which significantly reduces their impact on the housing site, they are relatively inexpensive compared to traditional housing options, and they require much less DIY work to be livable. in terms of developing a fully off-grid housing option, they also make it easy to experiment in a grid-adjacent location before pulling the plug and going independent.
in a community setting, it would be interesting to develop a distributed smart grid that can balance energy reserves across the community automatically. this would apply equally to trailer-mounted solar, other available renewables, and backup energy sources (such as bio-diesel generators).