Compared to WordPress, Drupal is still just experimenting with models for funding contrib development. Over the past year more and more Drupal (and a few WordPress) projects are beginning to use Open Collective as it’s is one of the first to provide fiscal sponsorship for projects and teams.
On that note, have you considered creating a collective for Radio Station? For some of the same reasons outlined in this comment/discussion, a collective may provide some additional opportunities to collaborate and sustain development across complementary projects.
More info can be found on their new site for OSS projects (https://www.oscollective.org/) and a bunch of folks are collaborating and lurking in https://slack.opencollective.com/