Building me a website

Hi I need so expert to design me a website for non profit .
site need to have navigation:
site need to design recommended standards
site need to design on standard that help people with special needs
site need to have recommended and latest trend of UI and Structure
site need to have excellent user experience
site need to provide all information and way of contact and the services we provide
site need to work front and back end for the services we willing to provide


please tell me your work price ,the technology and all requirement and technology willing to use on your offer to work to success as small business Entrepreneur
Thank you