On the composting piece, here's a great video about how to build your own composting tumbler. I'm fairly certain you can use the same (assuming that you put enough biomass and ash/sawdust) for composting humanure.
Thanks for visiting! On this site, I blog about new things I've learned, thoughts about my work, and life. This blog tends to have a strong focus on infrastructure, innovation, and entrepreneurship in the developing world.