In my case I am interested in 2, 1, and 3, in that order.
I am at the moment interested in seeing a film emulsion, which isn't too complicated, keeps well (in the best case up to 5-6 months) and gives repeatable results, which I am able to coat on glass.
Easy and repeatable is key for me - I can live with coating say, 10-12 plates and use them within one or two days time. Speed is not a big problem, I am happy with something like iso 6-12. The long term aim is to be able to be self sufficient enough to make salt/albumen prints from my own glass plates.