In Arizona you could also do something for solar panels. Solar panel companies are always trying to sell panels, but they can't tell you right away (a) what size/shape panels you can fit on your roof and (b) how much energy you're likely to generate, and what that's worth. I bet if they could give us that info (and it came from an impartial 3rd party like your startup) specifically customized for my house, they'd have a much better chance of selling me solar panels.