Building Price Progression

[GreatGuardian]

It's one thing to make the researches for elites in v6 take literally weeks, but I just noticed in one of the new beta realms that the building prices progress very unfairly after lvl 4. For Houses, I can understand - you get more housing capacity from level 4 to level 5. But barracks??? I want to recruit 100 more archers, so I need to spend the equivalent of 250K gold just to get to level 5. Either make it so that an increase in price gives you a justified increase in capacity, or scale prices more smoothly.