I would love to have one in my own personal backyard. However, it must be cost efficient in that it must pay for itself within 20 years.

I believe that human caused "global warming" is a bunch of crap, so that does not figure into my thinking. I want to do this to go off of the grid, and mostly, to lessen my usage of foreign energy. If the US could stop using foreign oil, I think the problems in the Middle East would suddenly disappear.

In summary, I want the US to be energy independent, but I understand and totally embrace Capitalism, meaning that the costs versus the returns must make economic sense.