Feminist activist. Expert fundraiser. Non-profiteer extraordinaire. I help people and organizations put their big ideas on paper and figure out how to make them happen. Learn more about me here: https://rebeccaandruszka.wordpress.com/
I think that Eventbrite is your best solution. It's simple to use from an organizer and user perspective, and there's little fuss in taking payments. No reason to get fancier.