NTBF – New buildings for the towns in Tribes of the East 3.1.

It's quite intricate. I understand the idea, but how are you planning to modify the game scripts to implement this concept?

I'm not very skilled in scripting, but as far as I know, you can add a script to the map that, when one building is constructed, will build/destroy/limit another, which is all that's needed for this scheme.

Has it been tested with a value of zero?!

Actually, no, I haven't, but it might work.