Customize WordPress s2Member plugin

Hello, I run a WordPress website which uses s2Member plugin to manage membership. As of now, the customers purchase membership one time, it means they have access to all pages for a lifetime, they have access through Custom Capabilities. I also run a support forum page on this website which is powered by bbPress plugin. I would like this support forum page to be available only first one year for the members and then they can renew their access to the support forum again for a fee. The rest of pages must be available for them for a lifetime. Also as there are already registered some users on the website, I would like for them 1 year free access to the support forum since I install/enable the plugin. Then they will have to a pay fee as well. The situation will be: Customer can buy access to pages and files unlimited (custom capability), access to the support forum only first year free - price for example $29. after a year they will don't have access to the support forum anymore and they will be able to renew the access to the forums for one year again. If you are interested and you think you are able to do this project, please get back to me with a feedback. Thanks for your time and interest.