Seeking feedback on pricing limited edition fine art photography prints

I am a nature and wildlife photographer based in Toronto launching a fine art prints store. Over a decade shooting in some less explored places like the High Arctic, Okavango Delta, Mara, forests of South Asia and more. Had an image on the cover of Canadian Photography Magazine and featured by BBC Earth on IG.

Prints are limited edition — 30 per image, 15 for select images with editorial recognition. Three substrates: Hahnemühle Baryta paper, Acrylic Facemount, and ChromaLuxe Metal, produced at a certified fine art lab in Toronto.

Entry price is CAD 550 for a 20×30" fine art photo rag (unframed) and goes up to CAD 8100 for an Acrylic facemount (ready to hang). At a given size, Acrylic Facemount runs 2.5-3x of photo rag. I am also thinking about increasing prices as prints within an edition sell out (threshold and % increase to be determined).

Full pricing and a couple of examples of the work here (edition of 30) and here (edition of 15).

Two questions for this community:

1. Does the entry price and 3x substrate premium between paper and acrylic feel justified based on the work?
   
2. Does within-edition price escalation, where later prints in an edition cost more, make sense or does it add friction for buyers?

Thanks.