You have a great talent, for how new you are to blockland/demo blockland. You're like my brother, stuck with the demo. He is about the same building skill as you. And to answer your need, I may buy you a blockland key to see what you can do with the fullexperience. Keep up your determination, and skill annd you will be a legend.
Looks very similar to this: http://www.mypen.it/blog/wp-content/uploads/2008/09/lego-beach-home.jpg
That's a cozy little beach house. I'd wanna be there for my summer!
Maybe that's what it's based off of?
Seriously though, you should spend the money on your brother, not on some guy you found on the forums.
Oh please, you do not need to spend money on the key. I want to be known for my demo builds alone.