Subscription manager

Hi,
I’m not sure if I’m in the right place, but I’ll ask anyway !

I have a client who manage a monthly issued paper magazine. He’s actually working with excel sheets to manage the data and send by snailmail the reminder for renewing subscriptions. He wouldn’t mind upgrading his service to something more … modern.

For him to continue delivering a good service, I would need to develop a gateway, for him to keep up to date the subscriptions and for his customers to buy/renew their subscriptions by themselves.

I’m looking for a plugin that could :
– manage clients profiles with custom fields
– manage subscriptions as a product based on dates
– send automatic reminders before end of subscriptions
– let customers manage their account and pay their subscription online
– export specific data for monthly postal purposes

I’m not sure if an ecommerce plugin would do that, or if a blog subscription plugin would be more profitable ? Or something else ??

Thanks for any advice