Solar should track your needs much better than wind in many parts of Australia, so the cost difference may not count for that much.

If you used a solar thermal plant and simply sent the power to an air heat pump then you should be able to cool a well-designed house sufficiently to last the night - perhaps by chilling water.

Hopefully they have a massive program for residential solar thermal panels too, or at least are putting one in place.

Household solar panels and (thermal) hot water systems are both subsidised by the government (up to a point).

Feed in tariffs have just been introduced in South Australia - hopefully they will be elsewhere as well in the not too distant future, especially with the new government talking about a 20% renewable energy target for 2020.