Hello sir,
I am a professional web developer. I have been working last 3 years. I see your proposal and i am able to complete this job as your requirement. if you can agree with me, i can start now.
It would be like work on similar things which we had already done previously. we are in team going work on this project. a teamwork can lead this project to more accurate than individual developer. so let us know when we need to start on it.