Wow your 3D looks great.. I love your layout too! Well done! I'm starting to try and engage render companies to show me what their render colour range will look like once applied to the house, so I'll see how I go. I know that what looks great in the 3D may not necessarily look good in reality
The main thing I need to do right now is select the window frames for the pre-fab frame. Having said that, it all has to match up with the render/brick colours.
I think I might start one of these building threads, the feedback you get from some of the people on here can be very valuable.