When it comes to rural internet access on the Iberian Peninsula, these guys are definitely the ones to talk to:
https://guifi.net/
It´s a community run mesh network (node to node) and with the wireless equipment you can get these days setting up a so called "air-fiber" is not as expensive anymore.
It will still need an end point connected to the internet, but this is a great community building tool. It is especially well developed in Catalunya, but in theory it can be used anywhere.
I know the people in the core do travel around and advice on setting up community infrastructure. And the best thing about it is that it´s community owned.