Less then that, far less. When the financial markets settle down, and they will, $65,000 invested modestly in a balanced portfolio will bring about 7-8%. This amounts to about $4700.00 or about $400.00 monthly and he would still have the original invested amount.
Of course there are taxes involved but even so his investment in solar at this time is a poor investment choice given the rapid growth of technology in this area.
I think he was putting it in as a hedge on skyrocketing electric rates. All the calculation done do not take into account ant rate increase forecast.