First idea will already cause lag. Every birthday house will be laggy due to huge number of players in the server.

There's a new job system coming. Something to do with AP(Align Point).

(Skip the pool part)

You can have a bigger house by purchasing a Gang House for iTunes or 15k Gralats for FB era users.

You can create shields that can cover half or everything on your character. Having 2 shields or more will make it harder to actually see what the player custom is.(just a check to see copyright issue)

We do have Z-room that's often host by the staffs. All the songs are made by the sfx, they're pretty good

Could you elaborate on how it will 'get you more money'?