After much lurking, I've finally done an interior showcase! The showcase cell is TR_SACarrow_Showcase. I based it on claim #11 in Hlan Oek, with the exterior shell being ex_hlaalu_b_18 and the interior shell based on Vorar Helas' house in Balmora.
The backstory is based on the idea of the Hlan Oek "underground," with the inhabitant appearing to be a simple fishermer with an interest in plants. A little searching shows the they have exotic tastes in food and a litle further searching reveals some possible dabbling in illegality. I even threw in a somewhat hidden trapdoor to the sewers (that could easily be removed) and put some of the furniture in enough disarray to suggest a struggle. This interior could either be the home to an extremely unfriendly Dunmer or a mysteriously vacant house, possibly the start of a search quest.
I'll drop this thread on Discord and then go to bed. .