When you are living in a huge, own house, you possibly are happy because of that, mainly during spring time. And what about winter? How much cash you are spending every year for warming? When your mansion is older then 10 years, it possibly doesn't have a decent wall insulation. Or probably even you do not have a modern windows which should protect your home from loosing the warm air. When you like to cut your costs, you must to spend some cash at the beginning.