BEAUTIFUL! I can see trying to sell your home - people will either roll their eyes or a family will get extremely excited... I myself would go nuts.. who cares what the HOUSE looks like, my babies would have a blast in their own outdoor haven!

Also, it looks like a ton of hard work went into it. Be proud of yourself and enjoy! Do you know what it would look like if my husband did it? He has absolutely no construction/home improvement abilities whatsoever and it might be a scary sight when finished! The scary thing is he thinks he can build and do home repair work well. Our conversation would go like this:
Him: I know what I'm doing!
Me: No, you don't... thats not structurally sound. The cats would knock it over in the first week.
Him: They won't.... its safe.
Me: No its not. Who went to design and architecture school? If memory serves, you went for education, so that leaves.... um.. lets.. see... ME! - At this point I stomp off (not pretty or mature, I know.)

So conrgrats on surviving the job and congrats on a job wel done! ENJOY!