Hello Laurent–thanks for getting in touch!
Good question. The tickets add-on is likely the best thing for you here. PRO does add recurring events–however, recurring events will not work with tickets. In other words, you will still need to create an individual event in order to create tickets for an event.
There are several tickets options available. The best one really depends on what ecommerce platform you prefer: WooCommerce, Easy Digital Downloads, WP-Ecommerce, Shopp or Eventbrite. We have a chart to help choose the right platform on this page, if it helps.
Let me know if you have any follow-up questions here and I’d be happy to help. đŸ™‚
Cheers!
Geoff