Moblin maze mongers! build your own dungeon maze

Hello fellow Adventurers of Eorzea, Recently a long time buddy of mine and i have finally saved up enough gillz to get a house. so we were thinking up numerous ways to design our new mansion. With so many add ons coming soon to FC housing (chocobo stables, workshop) why not give us the option to create secret maze like dungeons underneath our FC estate! how cool would that be. Thus bringing us to the topic of moblin maze mongers, a very unique form of game content that came about in FFXI, basically giving players a chance to order and customize mazes, by picking various objectives. the maze vendors could be stationed in your basement with a tunnel hole Furniture similar to the one in ffxi that takes you under ground. but of course this wont be a clone project of the ffxi version just similar in more ways then one.
So what do you have in mind?

well it's quite simple, the idea would be you would get an empty cave space beneath your house a very vast cave, can't see the ceiling and you would be able to buy tunnel sections to build a map from a moblin npc vendor or something then there would be a new furnishing category called dungeon and there will be stuff like dungeon walls and dungeon roofs and dungeon decorations that you can use to decorate your tunnels.
so you could make it look like a town or a forest or a cave or a ruin then you would collect the monsters you want in the dungeon with a hunt skill which you'd get for doing the quest for moblin maze mongers it would work similar to mercy stroke
once you kill a monster with it you get them as a spawn able monster in your dungeon
just need one and you can use it on any monster even primals, even odin then you get dungeon settings can make it 4 or 8 man
which will auto adjust the difficulty based on the 4-8 man requirement you can also set a level cap and the enemies will auto adjust their difficulty to your specifications
obviously certain monsters will only be able to be used as bosses, primals FATE NM's etc.

And the Rewards can vary from vanity gear, Rare housing furniture, and materials maybe even some materials that can only be found in these maze's