I don't think that was meant to come across as as pricy/original, since it was just a placeholder put on the nail meant for the stamp frame, which was out for repair after being broken by the maid.

Agreed. My dad is a Minnesotan Old Man (TM) and he still drives Oldsmobiles from the 80s and uses a VCR.

I thought the counting was really meant to inform about her character - clearly, she's thought about doing this before.

Eh, I've had an English teacher named Title, a landlord named Tenant, and an allergist named Dr. Bloom. These things sometimes happen in real life, and always happen in Coen territory.

I can't help you there, unfortunately. I, like many, am not catching the names of many of the newer inmates.

Carnac the Magnificent: "Bunny, Skull, Bunny, Skull"
Envelope: "Name things you might find in a garden"

Was anyone able to tell what Aleida took from Judy and Yoga's room?

I grew up in Minnesota, then was shipped off to the deep south for a while during my teens. I once baffled a linguist so thoroughly that he simply froze. Transplant is plausible.