I don't care much about how to obtain or how expensive the houses are but my problem is houses are so useless in this game.

you can't logout on your bed, you can't re-watch cutscenes, you can't summon the barber guy, and it doesn't mean anything to stay in your house (my biggest problem with it).

staying in our house should give us some buff like exp plus, item drop rate plus, crafting buff, etc. give us some reason to go back to our room after we spent millions of gil for it.