I'm a fairly rookie GM and I'm running a campaign in which the characters are going to eventually become a group of professional monster hunters.
We are at present low level we are starting off with the basic types of monsters such as a simple "Kobolds took over our mine" quest and segueing into higher level monsters and especially demons at some point down the road.
The players are at some point, as they acquire wealth and some notoriety, going to receive a fortified base (as a safe-house) in the city where the adventure started. I'm trying to find a way that this safe house will be just that, a very safe place for the characters to stay in their off time. But when this will become an issue the villains will be powerful outsiders.
Is there any way that I could protect the house against intrusion or destruction by all but the more powerful of demons?
I would like to make this work so that when the protection is broken (as it will be at some point) it gives the OH S***?! factor to the players because the enemy was strong enough to destroy whatever... countermeasures are in place.
I should point out that as a GM I'm easygoing, this is a small homebrew campaign and we are very much just playing to play.