Idea#3: building houses in 3d

Time for the next big hit in the making millions department. Charles introduced us to another idea to finance his own private island. How is he going to do that ? *drum roll* So here is it:

Building houses in 3d !

Are you as confused as we were when we first heard that ? Like aren't all houses in 3d ? Or is he talking about virtual houses. Maybe he is talking about Second Life or The Sims. Offering to design houses for other players and charging money for this service. Because houses in the real world are by definition in 3d. But to our surprise (yes, we are still surprised by his brilliant mind) he was thinking of creating real houses in 3d.
Like an architect you might say...As did we. So you calculate statics and make sure that everything is designed safe and according to the local law. Just like every architect does, which in the end, is just another job. But this was never about having a second job to make money. It's about having a genius idea and watch the money rolling in with little to no work.
The king announced proudly "No, not like an architect. Just design beautiful houses with a 3d modeling tool. No one cares about statics in Africa. We just sell them there!". OK, we all believe him that the laws and safety concerns there are different and this might actually work. On the other hands we all had pictures of simple huts made of corrugated iron in our heads. But will someone building a house like that actually need a fancy design and a 3d model for this kind of residence ?
And this is where and how this idea died :-(

If you have any improvements to this idea or actually made some money using it please leave a comment (and maybe send Charles some money ;-) )