Are you sure that the more affluent households are going to respond to bits of toilet paper shoved through their letterboxes? (that may be their attitude to leaflets, not my opinion if you get what I mean).
I think there are different ways to market to different classes of prospects. Perhaps direct mail is a better way to approach these clients?
I don't know if anyone's noticed but a fair amount of marketing now is using the "credit crunch" angle to sell things. I'm currently putting together a mail shot coming from this angle, basically emphasising the financial saving of cleaning and restoring carpets, rugs, upholstery etc over replacing them. It'll be interesting to see the response rate to this, compared to another letter I'll be testing it against which is going to focus on the other benefits and stay away from money issues.
I'm planning to do a straight 50/50 split between the two letters and see how it works. This will initially be to my existing "most promising" list of about 1000, so 500 of each should tell a fairly accurate story. If I see a noticeable difference I'm considering going for a rented list, new territory for me!