It's great folks are talking about internet resiliency, but resist the temptation to go build the cool fun mesh network first and then the services that run on it second. You need the services first. You're far more likely to see your country or area getting islanded than you are to see your ISP suddenly switched off, and you're better placed to rebuild IP networks from a single access point where you can access a wiki and send local email than you are building services on your empty mesh