That makes this
understandable 
The amount of time you’d have fun with player housing depends on Blizzard’s implementation of player housing 
I don’t personally care about player housing but I realize that if Blizz adds it they’ll add achievements and collectible items to it. I’m a full time collector so that gives me stuff to do. If Blizz were to implement say different furnishings based on different themes present in the game for example: Ogre Theme, Orc Theme, Murloc Theme, etc and put in things to collect from around the world that would be MONUMENTAL o_o If they continue to add themes and stuff to collect over time then no it won’t be a weeks worth of interaction.
Now, if Blizz essentially adds the Garrison with its minuscule collectibles then yes it will be, implementation matters.