Build a Website for photo editing businesss

we would like to make dynamic website for our photo editing business. we don't want any cms. we need php coding. some points should be following once you making our website. 1. responsive website. should be load fast mobile or desktop. we will check google tools. 2. should be [login to view URL] validated HTML and CSS 3. coding should organized so any developer can understand your codes. 4. Coding should SEO friendly we would like functionality from this site [login to view URL] they are same business. we need about 95% same functionalities from pixelz and front end should change. let me know how much price with design and full error free website? and completion time? the basic process: user registers user chooses service user creates template user uploads images invoice is created Invoice paid --- images send to CPA admin CPA inspect images, rejected go back to user with credit against account redo them and sent to user user approves or declines using QC inspector declined images go to CPA admin CPA QC images - re-invoice thank you