Hi,
Thanks for the interest in our plugins.
I can help out here.
We have WooCommerce Tickets to sell tickets and that requires the core version of the Events Calendar found for free on WordPress.org: https://wordpress.org/plugins/the-events-calendar/
It does not require Pro to work only the core version.
I would review our new user primer before purchasing as the tickets do not have group stock and we do not have a way to create tickets for multiple events at once they can only be created per event:
https://theeventscalendar.com/knowledgebase/new-user-primer-woocommerce-tickets/
Let me know if you have any follow up questions.
Thanks