One way to get around building on horde night is to find a strong POI (one with walls that have lots of health) that's easy to make it so zombies can't reach you. One example is the tool store where all you need to do is destroy one 1k health ladder and they can no longer reach you if you're on the roof. Say they destroy half the store during horde night (which would be difficult for them to do even with increased settings and you doing nothing) all you have to do then is find the quest for that store to instantly and for free rebuild the entire store. It's like having a free horde base every week as long as you find the quest once during the week which is not difficult.
Rather than rebuilding existing POI's to have weaker walls or a stronger ladder, my suggestion to get around this is to add a fee to repair the building in order to do quests again in the POI, either in building materials like wood, concrete, or with dukes, or just not allow quests in POI's that are too destroyed. The rebuild cost could be determined by the tier of the POI or the amount of materials it would take to rebuild based on how much it is destroyed. Another idea is to add a repair time so that if a building is destroyed it doesn't just instantly reappear like magic when a player starts a quest.
Rather than rebuilding existing POI's to have weaker walls or a stronger ladder, my suggestion to get around this is to add a fee to repair the building in order to do quests again in the POI, either in building materials like wood, concrete, or with dukes, or just not allow quests in POI's that are too destroyed. The rebuild cost could be determined by the tier of the POI or the amount of materials it would take to rebuild based on how much it is destroyed. Another idea is to add a repair time so that if a building is destroyed it doesn't just instantly reappear like magic when a player starts a quest.