Hello from the GitHub team! It sounds like GitHub Sponsors might be helpful for you here.

Companies and individuals can sponsor you for your work, and you can coordinate feature requests or ongoing support right on your repository.

Open Source Collective or Open Collective can be helpful in tandem with Sponsors if you don't want to set up your own business bank account or legal status.

Sponsors currently supports monthly recurring payments, and we're in the middle of a staged rollout for one-time payments. If that would be helpful for you here, feel free to email me bdresser@github.com and we can get you set up :)