My cup of tea miniatures, I would stick with it, your items are lovely.
There are a lot of dolls house enthusiasts out there, you just have to find them.
See if you can find any teams to help you promote your items, 0.20 cents really isn't a massive amount of money you have to look at it as advertising, if you we're to advertise in a dolls house magazine it would cost a lot more.
Have you thought of writing to magazines, maybe making a few tutorials, or finding someone who blogs regularly?
Just a few ideas, which you might have already tried.