I don’t understand why you’re downvoted. It’s absolutely true that most people don’t like making purchasing decisions by privately comparing spec dumps, even though many programmers enjoy that.
Absolutely not. It should be abstracted out enough that it can be applied to all purchases and not just ceiling fans. Otherwise, you're going to be duplicating effort for the next purchase and you don't want to have to repeat yourself.
I was actually thinking of scaling to a site first, and then expand horizontally to all ceiling-mounted products. Because what's the point if I can't monetize my decision-making system?