https://www.ebay.com/itm/2-PACK-40V-18-4AH-736WH-LITHIUM-LIFEPO4-96-A123-26650-POWERWALL-DIY-EV-BATTERY/173304996422 could cause problems shipping across the boarder. might be great for golfcart /bike project or homepower.
https://www.alibaba.com great for finding heavy equipment like brick making machines
WIKI & BB
- rocket stoves
- underground houses
- pallet houses
http://web.archive.org/web/20170308213500/http://www.redcolony.com/ has neat articles related to survival and environments