Your designs have real potential but these are traditional roofs... we don't build traditional homes. The roof systems are very different...
Instead of the roofs looking like this (NO!)
http://www.safeguardroofing.net/wp-content/uploads/2011/03/Roof-Shingle.jpgRoofs should look like this (YES!)
http://www.getty.edu/art/exhibitions/overdrive/images/r31089_2006_m_30_ff22c_001.jpg