With the calculations from the crafters, who charge 30-100s per piece of t5 equipment, it looks like its time to organize the housebuilders to a Union, not working for prices lower than in relation to what the armorers, weaponsmiths, jewelers or tinks are working for.
With the current prices,a mithril armor (12 pieces) with weapon would be around 650s (1 run of mithril bars).On the other hand, housebuilders are expected to work for lowest prices, so even a large villa would be less expensive than a single suit of armor, even though the required time for the housebuilding is taking ages longer.
Lets not be suppressed by the other crafters and adventurers! Fair prices for building!