For such a small-scale project, I suggest you seek out the corporate users of your project and offer consulting / development contracts as a freelancer. This can be on a per-ticket basis on their side.

If it turns out that they have real use cases for your software they should be glad for the offering. Make sure to either request a high rate, as you are the leading developer and leading expert for the software. This high rate basically pays for further development (as a kind of training or investment into your offering).

If they don't have a use case, code quality might not be as important and you can thus justify to scale down your involvement until such use cases appear.