Here's what I'm seeing so far in Ireland
1 employee working in a q1 home = 32% of home complete
1 employee working in a q3 home = approx 9% of home complete
automatically you need a little more than 3 employees to do the job of one. this cost alone pegs the q3 home @ 300% increase in production cost (not including resources).
With only a 200% increase in total health gained? This shouldn't be.
A proposal :
Q1 home make last for 120 days [5 overtime tickets]
Q2 home make last for 192 days [8 overtime tickets]
Q3 home make last for 240 days [10 overtime tickets]
Q1 home takes 5 work tickets
Q2 home takes 8 work tickets
Q3 home takes 13 work tickets
Still think the HRM cost for each is progressively too much, and if you implement something like above, it makes the HRM easier to swallow.
However, I would suggest that costs would be as follows :
q1 base is 1000 HRM
q2 base is 2000 HRM
q3 base is 3000 HRM
Just a suggestion.