Yes, these transforming houses are pretty common, but they do require some skill. Im just going to keep this project going until I have literally added everything I can add. Please have comments on ideas I should add!
The world I built this house on was a custom world that I made in two seconds :P Its just about 600 blocks long and 600 blocks wide. So not too big but PLENTY big enough for my house :P

Update Log:
#1, Made the custom world I am building my house on and uploaded it for download. *Started house!