3.000 - 4.000 $ is not expensive for this feature.
but I don't get the point why crowd funding.
Firebase itself supports Cordova:
You can try IntelXDK to build your firebase or parse apps for free.
(It worked for me. I built once in January.)
It's important to see more wrapper services survive,
so if Ludei had Firebase plugin crowd funding, I'll in;
However, I don't know why not try IntelXDK instead.
If possible, I would rather pay 3.000 - 4.000 $ personally to revive cocoonjs.