Not saying it cant be done. But you do compete with well established firms making mature hardware of all sorts to solve the same problems centralized. There is a bump in the road there
And again, your opposition is people who go to war to stop countries from switching from petro-dollar for example. They do not play nice. Ready for that?
Not even on the same page economically. They cannot recognize some random guys building a community mesh. Such already exist in many places, ignored by all but their users.
If just one big giant aggregate network then it could be ended just as easily as switching off an ISP. But millions of small meshes each a few hundred nodes can outlive governments
Maybe. There is of course already lots of war tech on this that you might end up competing with. Low tech communication channels are usually easy to find.
There is no competition - none at all. There never is any competition when the entire community is trying to communicate against the will of the government.
I quite agree that the hardware and stuff to do this would be very useful in certain crisis situations, but enough people need to have it before the crisis, that is the problem.