How to build a country wide Meshcore network

0. See if you already have a community. If not, start it - website, meetups, ...
1. Get ham radio and rf enthusiasts on board. They know things you don't and it's much more difficult than just get a big antenna
2. Settle on frequency and parameters that work in the country. If don't know, EU narrow preset is good to start
3. Repeaters in line of sight, preferably on hills. Solar+battery powered nodes (we want the network to work when grid is down)
4. Monitor, communicate, test, tune
5. Meetups are good
6. Do all this before a revolution, before apocalypse
7. Get as many companion nodes as possible. Give them to family members - flashed and ready to go.
8. Use them daily to get a feel, see uncovered areas
9. Have fun!

Note: I do not take credit for this anywhere, it's just what I've observed others did. I have a shitty repeater in already well covered area, but hopefully I'll be able to set up and maintain a repeater in an uncovered area soon.