re: Who is interested in building this sort of stuff?

Ha ha Jack well spotted! its an Australian Water Dragon or AKA Eastern Water Dragon

They have the distinctive black flash behind the eyes and red under belly near ther front legs
There is a family of them living around the house, hiding in my timber stacks.
They can make pets if you wanted to cage them. I think the most damage they would do is sctarch you if to annoyed them. The will be about a meter when fully grown.
They eat insects and love bananas for some reason!