Hey Cliff,
Thanks for reaching out to us! That’s an excellent question you have there.
No, Event Tickets Plus (plus the core plugins) will not be enough for that. You also need an ecommerce solution in order to be able to sell tickets. Event Tickets plus currently works with WooCommerce, Easy Digital Downloads, WP E-Commerce, and Shopp. I believe the basic version of all these are free, and I know for sure that WooCommerce supports PayPal out of the box. Because payment is handled by PayPal you will not need an SSL certificate.
Let me know if this answers your question or if you have anything else you want to ask regarding this topic.
Cheers,
Andras