Hi, Sean.
Thanks for your interest in our plugin suite.
We have this KB article that may help: https://theeventscalendar.com/knowledgebase/making-members-calendar/
You would need both The Events Calendar and Event Tickets to accomplish RSVP functionality.
However, there isn’t a built-in way to do a “maybe” type of RSVP, only a “yes” or “no”. This may be possible with just a little bit of coding. You may also want to see if the idea exists at https://tribe.uservoice.com/forums/195723-feature-ideas/category/85258-event-tickets-events-tickets-plus — if not, feel free to add your idea.
It sounds like you may not need a paid version of either of those 2 free plugins so I’d suggest trying them out!
If you do find one of our add-ons you’re interested in purchasing, we have a pretty great Refund Policy so you can buy one or many of our add-ons and thoroughly test them.
Let me know if you have any follow-up questions.