From Triodos, a pioneer in ethical banking
https://en.wikipedia.org/wiki/Triodos_Bank
They offered a round of investment open to the public in the B4RN rural
community fibre. You can see they reached 102% of the target investment
(3 Million GBP) in this public call:
https://www.triodoscrowdfunding.co.uk/invest/broadband-for-the-rural-north
In the offer document you can see the description of the initiative for
potential investors. They offer 4.5% interest rate for an investment in
7 year term. The call it seems is still open for another month but
oriented to UK residents. A proof that CN proposals can be both feasible
and sustainable in financial (bankable) and local impact.
All the best, Leandro.