Arms Room Matrix

You conjure an extradimensional room in range that lasts for the duration. You then choose where its one entrance is located. The door must be drawn in ink on a wall within a building. As you finish drawing the door, you place your hand where you would like the door handle to be and a wooden door appears as drawn. The room is designed as you see fit and can store an unlimited amount of any sort of firearms, ammunition, smithing tools/materials. While in the room, crafting or mending firearms is halved but still requires the same amount of materials and monetary expenses. You and any other creature(s) you have designated at anytime before can enter the extradimensional room. Anyone entering must be able to fit within the door you have drawn. If the door is forcefully broken then room disappears and those inside find themselves in front of the wall where the door had been created. While closed, The door is engraved with the words "ARMs Room" and is both completely visible and accessible by any entity. If an entity has not been designated by you and enters the room, they must succeed on a Wisdom saving throw (DC your level + 5) or find themselves trapped in extradimensional void for five minutes. If they have succeeded then the room disappears and everyone inside finds themselves in front of the same wall. Upon being dismissed from the void following the five minutes, the entity finds itself standing in front of the door again not sure if they had entered at all. The spell will end at caster's will, duration time has been exhausted or building is destroyed. Anyone left inside after spell is discontinued finds themselves in front of the wall with nothing that was on their persons that was stored within the extradimensional room unless removed within the duration. The caster must complete a long rest before conjuring this room again.