Sounds interesting.
I did some designs for the buildings. Here some thoughts on them:
The chandler, metallurgist, kiln, pottery, brick oven and crematory would be the same as in dwarf mode. Make candles/torches for Rendermax, make Alloys, dry/extract stuff, make pottery, make bricks for megaprojects, burn items to ash/coal to make space.
The stables would feed grazers with mushrooms only, because I assume that most drow pets are belowground monster. The feeding station could be a smaller version. Either both, or only one... feeding station to feed meat to giant spiders and the like. One could make pets grazers that require food that does not actually grow anywhere, this way you can simulate a carnivore getting hungry, and your drow have to feed it. Easily manageable if the grazer value is low enough. Grazing pets could also require specific food, the cavern moss, this way you dont have surface animals, but rather break into the first cavern for your pets.
Emissary is the Embassy, and the Hoardmaster is the Trade Storage. First one calls caravans and sieges, second one unpacks special tradegoods, maybe does some in-fort trading. Emissary could also use your new scripts for converting invaders, but I'd rather say thats something for magic/late-game-tech.
Slag, Ore and Gem grinder take on the role of Slag Pit, to clean up slag from smelting, the Ore Processor to refine the ore before you smelt it, and gem-powders, which could be used for decorations, colors, glazing and the like.
Glassblower makes simple items from glass that are missing in the glass furnaces.
Slaughterhouse butcheres the custom itemcorpses I had to add, for the megabeasts and sentient invaders.
Boneshaper makes items from bone that are missing in the craftsdrow-shop.
Beast Kennels could train warbeasts, like the dwarven version, but without the armoring. Just skill increases, an early building.
Alarm lever/siren/whatever, simply runs the siren script.
What do you think? Do you like those, because I can easily do the reactions/inorganics for them, its mostly using dwarf-mode stuff. Its all basic fortress life stuff, and I'd be happy to help, that way you can focus on your scripts and testing.