I didn't manage to obtain the rights to determine the spawn rates of monsters in the second area, but we might've managed to clear the first area of monsters completely.
If I were to do away with the forest now, It would probably work as a straight-up extension to the kingdom area as I doubt the rabbits would come out from the forest to the open area.
While expanding the kingdom territory is not a priority right now, it's good to know that I can make an area safe for expansion using this method.
As for the summons, I decided to claim the 28 tickets and spent 8 on Bea's spellbooks, this way, my debt to her was more than settled and she even got a surplus from it.
Not to mention... it seems like she got a pretty rare one recently. She has acquired a skill for [Spatial Magic] from studying it.