I second patreon.
The plug-in is very good and provides an incentive for people to donate. I like how it directly integrates into discourse.
You can provide full transparency to your community (which was important to me).
What made me hesitant at first was that it promotes a monthly subscription model rather than one off donations. I doubted my self that people would be prepared to regularly donate.
I was wrong. Using patreon helped make my site sustainable long term. Especially as it grew and costs escalated.
People are happy to donate for support knowing it is a community (important word), that there are no adverts, and increasingly important knowing we are not like Facebook and don’t harvest people’s data.