Seems likely that the gas part could be abstracted out... once the rest is working ok. Then people could have a choice of putting in a solar or a wind generato

Seems likely that the gas part could be abstracted out... once the rest is working ok. Then people could have a choice of putting in a solar or a wind generator... or having all three. Gas lets them simplify the problem. Since the power generation is more easily controlled with gas, it makes the task less risky. It's also a multiple use thing... people already pay for heating, electricity, and for hot water, so this thing does all that for them too. So you can spread the cost over those things, plus you get paid rent, and money every year depending on how much power you generate. Finally you pay less on your electricity bills. As a bonus they get to pump money into a car company... which governments are wanting to do now to stop them dying. I wouldn't be surprised if there are government subsides people could get to cover the $7k too. Extending a mortgage for these things would be very easy to get as well. A very sensible approach all around... a good first step.