hello sir,
I am ready for your task, I will build your website using WordPress which has an API that let me build a website with your requirements, high security, full responsive design, easy editing and modifying content, and adding online payment gateway.
I provide online preview that allows you observe the updates of the website while I am working on it.
you can go through my portfolio to view my previous work. I am available to discuss more details and start your work.
best regards,