La Petite Monstrosity
Claire mentioned in her post a company called "La Petite Mansion." They specialize in custom playhouses and doghouses running up to nearly $20k. Never mind that they're awful, pretentious little horrors that I wouldn't want to live in even if they were more than three feet high (or whatever), and never mind that one would cost about what I pay for two years' worth of rent on my apartment, what on earth is the point of having a playhouse if it's so exactly like your real house that you can't play in it for fear of fucking it all up? When I was small, my brother and I had a lot of fun with a treehouse that my dad built for us in this gigantic oak in our back yard. Although I always planned elaborate structural improvements that would allow me to live there for ever and ever, it was pretty great the way it was. After all, the rampant mess and destruction caused by the squirrels discovering the stash of carefully collected acorns I kept there (good for confusing the dog from above) would have been much more of a tragedy if I'd had to worry about hand-painted wallpaper getting scratched or whatever.
I'm not even going to comment on the doghouses, because the pictures speak for themselves.