One of us is misunderstanding the other. I'm not advancing an idea, I'm describing what I've done and have working, which changes construction costs and times.

I too have no idea if this affects building maintenance. If it does, I suspect that the maintenance cost is set by the baseline build cost without discounts, so in this case 25% higher than vanilla EB regardless of city size. If that's the case, I think I approve, as it should be disproportionately hard for a small town to maintain higher tech. There's no one to cover for Lvcivs the master smith when he gets sick and so on.

I'm interested in your work on additional tax levels, as I'd very much like to see a no taxes setting for depopulated towns (and for BI engine mods, towns of the wrong culture)