I don't know if it would break-even that fast, but I would say much of why people are not doing it yet is that the technology is so new people don't know about

I don't know if it would break-even that fast, but I would say much of why people are not doing it yet is that the technology is so new people don't know about it, and also there are some very powerful entrenched interests fighting it. Like the present US administration.