I don't know how realistic your numbers are, but $40,000 to install solar power into your home sounds quite extreme to me, and I can tell you for sure that I pay less than $1,000 a YEAR for electric at my house!
However, we are looking into putting a wood burner in at our house, and it will probably pay for itself in the first year with the price of natural gas going up again. We have lived in our house seven years, and the price of natural gas has nearly tripled in that time! I used to pay about $500 a year, and now we pay close to $2,000 a year for natural gas. Wish my wages went up that fast, I might have a chance of keeping up with these costs!!