Dear Sir,
I am writing to offer you my help with creating this project. I am an experienced web developer, and I have worked on projects like this before, and I can show you my previous work. The project you described can be completed in less then five days. We can discuss the project with more details.
I guarantee for the quality of my products, of course. All the products I create are responsive, SEO optimized and are following modern design themes.
For any questions, please contact me.
Yours faithfully,
Dusan Nesic