HoMM3 HD is a mod (add-on) for the game Heroes of Might and Magic 3.

How difficult/time-consuming is it to start with 200% resources and 2500 gold on M maps (on any template or at least on specific ones)?

AGAINST! Think about those who play single-player. They start with 0 resources. Just need to create a separate difficulty level (replace the pawn, because the pawn can turn into any figure :cool: ) with customizable resources, and that's it :)