If you build it

If you build it they will come! Horace Burgess prayed to God and received a divine message! "If you build me a tree house, I'll see that you never run out of materials." 15 years and he's still going. The tree house currently stands at 97 feet, it has 10 levels and a bell tower.
Yes he told you to build a tree house... but all he said was you wouldn't run out of materials? I'm thinking it was suppose to be a metaphor.
Brings me to a point. When are you as a designer finished with the product. Some people think that you are never actually finished. But, I think your done once the design does what it is suppose to do without it being too much.