Ok-- "Cheaty", but probably necessary solution time.
Pencil_Art's house is being fashioned from wood for the time being, due to resource limitations.
I can cram 4 kilns on his roof. (he has a 7x7 building footprint, which is enough for 4 densely packed workshops)
Those 4 kilns will have nothing but "Collect clay" jobs running. Any dwarf can collect clay.
The collected clay will be used to make "slum housing" on the far eastern edge of town.
The slum housing will permit me to cannibalize the materials already invested in proper peasant housing, and redirect it toward Her Majesty’s Royal Commode.
The mason's workshop is at capacity just queueing up all the furniture Her Majesty needs for her rooms. It is already early summer, and I only have half of her required furniture made. Using the "cannibalize buildings" method, I have the outer walls of floor 1 of her tower laid, and about 1/2 of the floor tiles of floor 1 laid. Until now, I have been hammering out baked bricks and reconstructing peasant housing with said bricks to get materials. This is going too slowly. Wholesale rebuild with "Slum housing" at high density at the north eastern edge of town will permit me to mass-demolish peasant housing. The slum housing will have to be decommissioned and replaced with baked brick slum housing as time and resources permit-- but this will at least home the homeless, and will hopefully provide enough cut stone blocks to at least get her majesty into a bedroom, and into an office before the end of the year.
I am saving and going to bed for the night.
Also-- Her majesty's little troupe of incompetence included our very own outpost liason, which is listed as a nobility position, and he has requirements. Where does he fit into this sordid mess? EG-- how big of a land parcel does he get?