I wonder what sort of levels of support would be needed to attract quality developers currently?

Me too, but I do suspect that we could do it as a community participation effort, and relying on this point.

That, I guess, would depend on the countries the developers reside in.

A $100 post reward for example might be quite an enticement in some parts of the world - whereas in the UK or USA that might not be such an attraction if it reflects several days of development work.

I sort of doubt if many people in the US, UK, or the western EU countries would be able to dedicate much time to it at current price levels, but that might not be true elsewhere.