My first attempt at any sort of modding of any kind, I chose the exterior hlaalu 16 shell as my base for a 4x2x2, although I believe its normally used as a dual apartment shell (single 4x2x1 stacked)

The idea behind my interior is a novice or otherwise "new/unskilled" alchemist, with some little context clues for the player on some alchemy recipes (coda flower, sweetpulp next to a rising force potion, horn bulb and hackle-lo on a shelf next to resist paralyze potion and paralyze poison, etc) while also showing that the alchemist isnt that good (bargain quality, a "lost" spoiled potion, and a damage health potion hidden somewhere too)

Also a little hidden reason why the NPC is living in squallor, if the player does a tiny amount of investigation. 

I feel like the cell could use more "clutter" being a 4x2x2 over a 3x2x2, but at the same time I felt like an "struggling alchemist" would focus their income on ingredients and such over cups and bowls and the like. I sent it with a clutter count closer to a 3x2x2 from various examples I've seen, with the idea that I could add more if it felt too empty.