Good survey questions.
I can only speak for myself, but:
The only one I had difficulty with was on the last page about figures, to me, sculpt quality and period accuracy are on equal par both being no.2, coming in close behind range completeness [no.1]. Together, they are a trifecta of bliss!. A quality sculpt, in my definition means both defined in detailed and limited mold lines/flashing. Take Battlefront for instance, their figure quality has dropped considerably with incomplete mold fills, heavy flashing, and poor castings common to many vehicles; all causing many to wonder, what happened to the company of 10+ years ago?! Price is not so much a factor with me, unless, it is insane pricing like the current consumer concerns about G[reed]W[orkshop]. I will gladly pay for quality figures like those sculpted by (Paul Hicks, Perry Bros., Richard Ansell, etc., etc.).
Good luck with your project!
David