At Storm Biz we don't believe in gradually learning how to do things... We jump in to the most difficult website we can do, as this teaches us everything we need to make future designs easier. Well this turned out to be true, as our first fully responsive website turned out to have 9 different coloured themes, 12 different contact pages, 22+ different galleries, and over 30 Content pages. This complex website took us almost 3 weeks to complete. We have since changed our own website and accounting system to a responsive design, this only took us 4 days for both systems. The websites that we now design that are responsive, take an additional 1 - 3 days to design, implement and test (dependent on website and component complexity). Considering the increase of traffic that your website will now receive, the initial investment is minimal.