I'd love to have some challange to test my defences in later stages of the game, since in vanila I can easily automate Nauvis with replenishable borders and forget about it for 300-400+ hours. The problem is I don't like to work under constant stress, so is it possible to do initial building up without this mod active and then when you are somewhat ready - starting it up?

Alternatively, you can open the start menu from the player settings and increase the peace mode time. Then, you can turn it back on when you're ready.