If it makes anyone feel better, I have all retainers you could possibly rent (paid not free ones) and 4 characters on my account. Yet I still have no space lol. It's not that I am hoarding everything possible but crafting takes up lots of space, then the gear sets (crafted/looted,tomes), relic items for multiple jobs, orchestra scrolls they sneak in your inventory and nobody wants, stacks of potions nobody needs and the list goes on... If I could pay for more retainers, I would but these are sadly limited, however I would welcome some inventory or armory increase especially if they are adding more jobs with 4.0.