Hi Limam, I've checked your attachment and also read your description, I can create a site with the subscription functionality you need. The process will be divided into 3 stages, prototyping, coding, testing and delivery. I'll be always accessible for later support but in the included price I'll work until the website is functional and finished which should take no longer than 1 month. After that, we can discuss either a fixed monthly price for support or an hourly based support.
I hope we can work together on this project of yours, seems really interesting.
Best regards
Oscar