Current questions and answers regarding the map editor.

By the way, you could combine everything with the market. There's some unnecessary stuff there about sending gold to the opponent. But again, it wouldn't be pretty, but without any "flashing" effects.
Here, the only option is to have a two-level system without any connection to the player, with a random change in type (if the bonus appears when the type changes, then it's great), and the bonus distribution is done via scripts (if possible), according to the building that our hero clicks on - then 7 would be enough, even for 50 buildings!