IMO in canon, mostly plausible with Tharda because of the Legions or by dragging out construction over years and decades in other kingdoms with a smaller workforce in stages.
Good point. A regular army can become a workforce in times of peace, as with Rome. You might have some skilled engineers a spart of the army as well.
I believe you got that number from Beaumaris, which dwarfs anything on Harn (with the exception of the city walls, which were likely built over decades, and Burzyn, which was clearly based on Beaumaris and has been the subject of considerable derision on this board already.)
Dover Castle actually. And this was during the initital period of the construction - It was enlarged at a later date.
That castle required "400 masons", and a long list of relatively unskilled laborers. Any projects on Harn (other than Burzyn) clearly would require only a fraction of that number.
I already conceded that -
Dover is a big castle, no doubt, but even quartering that you are looking at about 900d per day for labor. AND what makes it even tougher, finding a work force of 700 workman would be tough in population challenged Harn.
Burzyn being an exception of course. But your standard Harnic Castle would probably take a good 700 employees working on it, maybe 100 as Masons. And let us not forget even keeps and fortified stone manorhouses - maybe 1/2 to one 1/4 of the number for a keep, and I'd think even a fortified stone manor would take 1/10th of that.
And IIRC, even with this large labor force, Dover took 10 years to complete.
Figure 900d per day for a castle, plus the cost of the "leaders" or masters in charge of the program. 1000d per day would make sense. And you are likely going to feed and house these people, the accomodations would not be sufficient locally. I'd guess that paying going wages plus food and housing would be the norm for this type of relocation job.
And yes, I'd agree Journeymen could be included in the masons, though apprentices would not be that skilled and mostly young boys - I'd factor them more into the unskilled workforce.
The combination of costs and logisitics of manpower would make building such structures tough. One of the reasons the Early Saxons small knigdoms may not have had stone fortresses for the most part, reserving stone for churches is that they may have not had the resources to justify such a building project. I don't know, just a thought.