@paroj / @dark_sylinc or any other OGRE3D team members.
Have you considered applying for an EPIC MegaGrant?
https://www.unrealengine.com/en-US/megagrants
They have been giving grants to many prominent open source projects like Blender and Godot, but also to other ones like https://www.raylib.com/ for example which is not so well known.
From the site:
TOOL & OPEN-SOURCE DEVELOPERS
Developing a software tool that integrates with UE4? Creating open-source tools or enhancing the capabilities of open-source software to benefit the 3D graphics community? We love supporting open projects that solve tough problems or improve workflows.