I really wish there was a finance group for solarpunk stuff. It's a constant problem, and when I join any of the many groups online, no-one seems to acknowledge it. If there was some sort of fund that we could contribute to that handled the financing, and looked strictly for long term investments, I'm sure that it would make money, that could then be put back into more long-term solarpunk investments, for the good of all. I don't know how to set such a thing up, or I'd do it myself!
I can't contribute that much yet. I'm working on a set of real estate investments to hopefully start the chain within 5-6 years. One of the things that would help for now is to experiment with small projects and hopefully identify something(s) that could make a good long term investment engine.