Build a website for my Business

I want to build a website like www.webstune.com. I have a web development company in which we can’t afford to make websites in low cost. So, the number of clients is limited. Therefore, I want you to find which techniques they are using to build websites in such a low cost. Just go through the website and give me a fair idea about how can you track the techniques to build such a system. Please mention 567 in your proposal so that I understand that you have read my description and gone through the website. I’m having a lot of projects coming soon. If you perform well, we can have a long-term association.