designing new website and search optimisation

Hi I am launching a new business and I need somebody to design and optimise the website for me.I am based in london. My business is based on on-line orders so it is very important that my website be optimised for search engines, I want it to be the organic search friendly. I provide energy performance certificate for my customers. Website should have the following pages: 1-home 2-service 1 3-service 2 4- service 3 5-service 4 6- contact us 7- about us 8-terms and conditions 9-order now (this page should get connected to paypal and it is a form which let the customer put their details in and choose the right product). At the end of the design the website should look like this website [login to view URL] I have designed a website by my self and you can see it in the following address [login to view URL] my details are there too. I need somebody to be QUICK and reliable and work with me all the time.I might need to change my prices or other details all the time so I want you to work with and for me. I will proved the details which goes in the website. I will buy the domain and I already have an account with fasthost. SEARCH OPTIMISATION is the most important part of the design so you need to give me promises about it otherwise there is no point to have the website, hope you understand my [login to view URL] is the case that ''the winner takes it all'' so website should be very strong and visible to search engines The website should be optimised and the main keywords are EPC, HIP, commercial EPC, DEC, energy performance certificate, display energy certificate, home information pack or the following post codes areas in london Acton, Shepherds Bush, Noting Hill, Kensington, Chiswick, Richmond, Twickenham(W1-W3-W4-W5-W6-W7-W10-W11-W12-W13-TW1) Please give me an inclusive price or idea about how much is it going to cost, I dont like people who keep coming back to me and ask for money. Please do not hesitate to contact me if you have any enquiry. Thanks a lot